llama90 commented on issue #38569:
URL: https://github.com/apache/arrow/issues/38569#issuecomment-1793680050

   To conclude, it seems you are correct that the `upper` function being called 
within `micro_benchmarks` is the cause. When the test subject strings are 
configured to distinguish between uppercase and lowercase (`A`-`z`, `Z-a`), 
differences appear in the results.
   
   Thank you. Through the aspects you mentioned, I was able to understand the 
cause more clearly.
   
   ---
   
   It was possible to observe a performance difference for AsciiLower and 
AsciiUpper when mixed cases were involved. (There were also differences for 
SplitPattern and IsAlphaNumericUnicode, but these will be ignored here as they 
do not represent a common performance difference across all tests.)
   
   I have reviewed the following to understand why the range affects the 
benchmark:
   
   For clear verification, I performed the following actions on 
`arrow-compute-scalar-string-benchmark` which uses the `random.cc`. The logic 
for generating random strings for the String type utilizes the following 
function, applying only the string length within a fixed character range (`A` - 
`z`). I conducted tests by altering these values.
   
   
https://github.com/apache/arrow/blob/fc8c6b7dc8287c672b62c62f3a2bd724b3835063/cpp/src/arrow/testing/random.cc#L366-L407
   
   * Executed the benchmark `arrow-compute-scalar-string-benchmark` using the 
range in `random.cc` (random.h) as follows:
       * `A-z` (range: 52)
       * `A-Z` (range: 26)
       * `a-z` (range:26)
       * only `A`, `a`, `B`, `b` (range: 1)
       * `Z-a` (`A-B`, `a-b` (range: 2)
           * Check the overlap between upper case and lower case
   
   
   <details><summary>A - z</summary>
   
   ```
   Unable to determine clock rate from sysctl: hw.cpufrequency: No such file or 
directory
   This does not affect benchmark measurements, only the metadata output.
   2023-11-05T12:51:50+09:00
   Running 
/Users/lama/workspace/arrow-build-test/cpp/cmake-build-debug/debug/arrow-compute-scalar-string-benchmark
   Run on (10 X 24.1204 MHz CPU s)
   CPU Caches:
     L1 Data 64 KiB
     L1 Instruction 128 KiB
     L2 Unified 4096 KiB (x10)
   Load Average: 19.62, 13.09, 21.27
   ***WARNING*** Library was built as DEBUG. Timings may be affected.
   
-----------------------------------------------------------------------------------------------
   Benchmark                                     Time             CPU   
Iterations UserCounters...
   
-----------------------------------------------------------------------------------------------
   AsciiLower                            126596351 ns    102234857 ns           
 7 bytes_per_second=155.014M/s items_per_second=10.2565M/s
   AsciiUpper                            108163111 ns    102306667 ns           
 6 bytes_per_second=154.905M/s items_per_second=10.2493M/s
   IsAlphaNumericAscii                    99619232 ns     98232429 ns           
 7 bytes_per_second=161.33M/s items_per_second=10.6744M/s
   MatchSubstring                        265327153 ns    257578000 ns           
 3 bytes_per_second=61.5264M/s items_per_second=4.07091M/s
   SplitPattern                          349064062 ns    346818000 ns           
 2 bytes_per_second=45.695M/s items_per_second=3.02342M/s
   TrimSingleAscii                       112687937 ns    112247500 ns           
 6 bytes_per_second=141.187M/s items_per_second=9.34164M/s
   TrimManyAscii                         135451817 ns    135040600 ns           
 5 bytes_per_second=117.356M/s items_per_second=7.76489M/s
   MatchLike                             118694500 ns    118310167 ns           
 6 bytes_per_second=133.952M/s items_per_second=8.86294M/s
   MatchLikeSubstring                    254574667 ns    253288000 ns           
 3 bytes_per_second=62.5685M/s items_per_second=4.13986M/s
   MatchLikePrefix                        56798872 ns     56452833 ns           
12 bytes_per_second=280.727M/s items_per_second=18.5744M/s
   MatchLikeSuffix                        59460042 ns     57332083 ns           
12 bytes_per_second=276.422M/s items_per_second=18.2895M/s
   Utf8Lower                             124983305 ns    122885833 ns           
 6 bytes_per_second=128.964M/s items_per_second=8.53293M/s
   Utf8Upper                             122891783 ns    121961000 ns           
 5 bytes_per_second=129.942M/s items_per_second=8.59763M/s
   IsAlphaNumericUnicode                 242970972 ns    224661333 ns           
 3 bytes_per_second=70.541M/s items_per_second=4.66736M/s
   TrimSingleUtf8                        105753631 ns    105216143 ns           
 7 bytes_per_second=150.622M/s items_per_second=9.96592M/s
   TrimManyUtf8                          146198633 ns    145622200 ns           
 5 bytes_per_second=108.828M/s items_per_second=7.20066M/s
   BinaryJoinArrayScalar                    513846 ns       512393 ns         
1370 bytes_per_second=225.339M/s
   BinaryJoinArrayArray                     595282 ns       592727 ns         
1190 bytes_per_second=194.798M/s
   BinaryJoinElementWiseArrayScalar/2      3774192 ns      3764715 ns          
186 bytes_per_second=61.8489M/s
   BinaryJoinElementWiseArrayScalar/8      8379259 ns      8346762 ns           
84 bytes_per_second=111.905M/s
   BinaryJoinElementWiseArrayScalar/64    30608786 ns     30485435 ns           
23 bytes_per_second=245.379M/s
   BinaryJoinElementWiseArrayScalar/128   48874914 ns     48757286 ns           
14 bytes_per_second=306.722M/s
   BinaryJoinElementWiseArrayArray/2       2496855 ns      2491751 ns          
281 bytes_per_second=93.4457M/s
   BinaryJoinElementWiseArrayArray/8       6885788 ns      6866119 ns          
101 bytes_per_second=136.037M/s
   BinaryJoinElementWiseArrayArray/64     29454262 ns     29395833 ns           
24 bytes_per_second=254.474M/s
   BinaryJoinElementWiseArrayArray/128    47788347 ns     47710533 ns           
15 bytes_per_second=313.451M/s
   BinaryRepeat                          119525042 ns    119285333 ns           
 6 bytes_per_second=132.857M/s items_per_second=8.79049M/s
   ```
   
   </details>
   
   <details><summary>A - Z</summary>
   
   ```
   Unable to determine clock rate from sysctl: hw.cpufrequency: No such file or 
directory
   This does not affect benchmark measurements, only the metadata output.
   2023-11-05T13:29:17+09:00
   Running 
/Users/lama/workspace/arrow-build-test/cpp/cmake-build-debug/debug/arrow-compute-scalar-string-benchmark
   Run on (10 X 24.1206 MHz CPU s)
   CPU Caches:
     L1 Data 64 KiB
     L1 Instruction 128 KiB
     L2 Unified 4096 KiB (x10)
   Load Average: 21.22, 8.88, 7.84
   ***WARNING*** Library was built as DEBUG. Timings may be affected.
   
-----------------------------------------------------------------------------------------------
   Benchmark                                     Time             CPU   
Iterations UserCounters...
   
-----------------------------------------------------------------------------------------------
   AsciiLower                             50217964 ns     46028933 ns           
15 bytes_per_second=344.302M/s items_per_second=22.7808M/s
   AsciiUpper                             39421998 ns     39257765 ns           
17 bytes_per_second=403.687M/s items_per_second=26.71M/s
   IsAlphaNumericAscii                   120946236 ns    120427833 ns           
 6 bytes_per_second=131.596M/s items_per_second=8.70709M/s
   MatchSubstring                        252679167 ns    248814000 ns           
 3 bytes_per_second=63.6935M/s items_per_second=4.2143M/s
   SplitPattern                          299022229 ns    298483000 ns           
 2 bytes_per_second=53.0946M/s items_per_second=3.51302M/s
   TrimSingleAscii                       112433847 ns    111774000 ns           
 6 bytes_per_second=141.785M/s items_per_second=9.38122M/s
   TrimManyAscii                         149166142 ns    140845000 ns           
 5 bytes_per_second=112.52M/s items_per_second=7.44489M/s
   MatchLike                             120614361 ns    120173500 ns           
 6 bytes_per_second=131.875M/s items_per_second=8.72552M/s
   MatchLikeSubstring                    250514431 ns    249707333 ns           
 3 bytes_per_second=63.4657M/s items_per_second=4.19922M/s
   MatchLikePrefix                        56792788 ns     56595000 ns           
12 bytes_per_second=280.022M/s items_per_second=18.5277M/s
   MatchLikeSuffix                        56761417 ns     56597917 ns           
12 bytes_per_second=280.008M/s items_per_second=18.5268M/s
   Utf8Lower                             123031313 ns    122381000 ns           
 6 bytes_per_second=129.496M/s items_per_second=8.56813M/s
   Utf8Upper                             122140590 ns    121736167 ns           
 6 bytes_per_second=130.182M/s items_per_second=8.61351M/s
   IsAlphaNumericUnicode                 410607062 ns    409221000 ns           
 2 bytes_per_second=38.7269M/s items_per_second=2.56237M/s
   TrimSingleUtf8                        111638805 ns    111270000 ns           
 6 bytes_per_second=142.427M/s items_per_second=9.42371M/s
   TrimManyUtf8                          145255867 ns    144850200 ns           
 5 bytes_per_second=109.408M/s items_per_second=7.23904M/s
   BinaryJoinArrayScalar                    517262 ns       515486 ns         
1347 bytes_per_second=223.987M/s
   BinaryJoinArrayArray                     599597 ns       597625 ns         
1172 bytes_per_second=193.202M/s
   BinaryJoinElementWiseArrayScalar/2      3839304 ns      3825164 ns          
183 bytes_per_second=60.8715M/s
   BinaryJoinElementWiseArrayScalar/8      8526469 ns      8401663 ns           
83 bytes_per_second=111.174M/s
   BinaryJoinElementWiseArrayScalar/64    30989161 ns     30885739 ns           
23 bytes_per_second=242.198M/s
   BinaryJoinElementWiseArrayScalar/128   51342012 ns     51161357 ns           
14 bytes_per_second=292.309M/s
   BinaryJoinElementWiseArrayArray/2       2711756 ns      2560080 ns          
275 bytes_per_second=90.9516M/s
   BinaryJoinElementWiseArrayArray/8       7016266 ns      6995290 ns          
100 bytes_per_second=133.525M/s
   BinaryJoinElementWiseArrayArray/64     30042234 ns     29939261 ns           
23 bytes_per_second=249.855M/s
   BinaryJoinElementWiseArrayArray/128    48674205 ns     48520286 ns           
14 bytes_per_second=308.22M/s
   BinaryRepeat                          117393298 ns    117199833 ns           
 6 bytes_per_second=135.221M/s items_per_second=8.94691M/s
   ```
   
   </details>
   
   <details><summary>a - z</summary>
   
   ```
   Unable to determine clock rate from sysctl: hw.cpufrequency: No such file or 
directory
   This does not affect benchmark measurements, only the metadata output.
   2023-11-05T12:55:36+09:00
   Running 
/Users/lama/workspace/arrow-build-test/cpp/cmake-build-debug/debug/arrow-compute-scalar-string-benchmark
   Run on (10 X 24.1203 MHz CPU s)
   CPU Caches:
     L1 Data 64 KiB
     L1 Instruction 128 KiB
     L2 Unified 4096 KiB (x10)
   Load Average: 17.92, 12.78, 19.09
   ***WARNING*** Library was built as DEBUG. Timings may be affected.
   
-----------------------------------------------------------------------------------------------
   Benchmark                                     Time             CPU   
Iterations UserCounters...
   
-----------------------------------------------------------------------------------------------
   AsciiLower                             68504931 ns     47875600 ns           
15 bytes_per_second=331.021M/s items_per_second=21.9021M/s
   AsciiUpper                             46894272 ns     46014600 ns           
15 bytes_per_second=344.409M/s items_per_second=22.7879M/s
   IsAlphaNumericAscii                   109179389 ns    108756000 ns           
 6 bytes_per_second=145.719M/s items_per_second=9.64155M/s
   MatchSubstring                        262322180 ns    261283333 ns           
 3 bytes_per_second=60.6539M/s items_per_second=4.01318M/s
   SplitPattern                          399403687 ns    398345500 ns           
 2 bytes_per_second=39.7842M/s items_per_second=2.63233M/s
   TrimSingleAscii                       113099604 ns    112723167 ns           
 6 bytes_per_second=140.591M/s items_per_second=9.30222M/s
   TrimManyAscii                         137971083 ns    137643200 ns           
 5 bytes_per_second=115.137M/s items_per_second=7.61807M/s
   MatchLike                             119181104 ns    118868333 ns           
 6 bytes_per_second=133.323M/s items_per_second=8.82132M/s
   MatchLikeSubstring                    262609319 ns    261861333 ns           
 3 bytes_per_second=60.52M/s items_per_second=4.00432M/s
   MatchLikePrefix                        57234142 ns     57110167 ns           
12 bytes_per_second=277.496M/s items_per_second=18.3606M/s
   MatchLikeSuffix                        57068629 ns     56907000 ns           
12 bytes_per_second=278.487M/s items_per_second=18.4261M/s
   Utf8Lower                             122208132 ns    121717000 ns           
 6 bytes_per_second=130.202M/s items_per_second=8.61487M/s
   Utf8Upper                             152733583 ns    123730500 ns           
 6 bytes_per_second=128.084M/s items_per_second=8.47468M/s
   IsAlphaNumericUnicode                 412612563 ns    409943000 ns           
 2 bytes_per_second=38.6586M/s items_per_second=2.55786M/s
   TrimSingleUtf8                         93089458 ns     92609000 ns           
 8 bytes_per_second=171.126M/s items_per_second=11.3226M/s
   TrimManyUtf8                          129182483 ns    127529000 ns           
 5 bytes_per_second=124.269M/s items_per_second=8.22226M/s
   BinaryJoinArrayScalar                    521784 ns       518275 ns         
1342 bytes_per_second=222.782M/s
   BinaryJoinArrayArray                     635901 ns       609174 ns         
1164 bytes_per_second=189.539M/s
   BinaryJoinElementWiseArrayScalar/2      4034207 ns      3929483 ns          
180 bytes_per_second=59.2555M/s
   BinaryJoinElementWiseArrayScalar/8      8474070 ns      8427341 ns           
82 bytes_per_second=110.835M/s
   BinaryJoinElementWiseArrayScalar/64    31594422 ns     31024435 ns           
23 bytes_per_second=241.116M/s
   BinaryJoinElementWiseArrayScalar/128   53196176 ns     51912143 ns           
14 bytes_per_second=288.082M/s
   BinaryJoinElementWiseArrayArray/2       2562493 ns      2550762 ns          
273 bytes_per_second=91.2839M/s
   BinaryJoinElementWiseArrayArray/8       7039630 ns      6992545 ns           
99 bytes_per_second=133.577M/s
   BinaryJoinElementWiseArrayArray/64     29908516 ns     29812565 ns           
23 bytes_per_second=250.917M/s
   BinaryJoinElementWiseArrayArray/128    48417548 ns     48254357 ns           
14 bytes_per_second=309.919M/s
   BinaryRepeat                          116653729 ns    116475667 ns           
 6 bytes_per_second=136.061M/s items_per_second=9.00253M/s
   ```
   
   </details>
   
   <details><summary>A</summary>
   
   ```
   Unable to determine clock rate from sysctl: hw.cpufrequency: No such file or 
directory
   This does not affect benchmark measurements, only the metadata output.
   2023-11-05T16:50:40+09:00
   Running 
/Users/lama/workspace/arrow-build-test/cpp/cmake-build-debug/debug/arrow-compute-scalar-string-benchmark
   Run on (10 X 24.1206 MHz CPU s)
   CPU Caches:
     L1 Data 64 KiB
     L1 Instruction 128 KiB
     L2 Unified 4096 KiB (x10)
   Load Average: 24.58, 10.63, 7.73
   ***WARNING*** Library was built as DEBUG. Timings may be affected.
   
-----------------------------------------------------------------------------------------------
   Benchmark                                     Time             CPU   
Iterations UserCounters...
   
-----------------------------------------------------------------------------------------------
   AsciiLower                             59260619 ns     45435200 ns           
15 bytes_per_second=348.801M/s items_per_second=23.0785M/s
   AsciiUpper                             54146987 ns     40933000 ns           
16 bytes_per_second=387.165M/s items_per_second=25.6169M/s
   IsAlphaNumericAscii                   137384979 ns    130968167 ns           
 6 bytes_per_second=121.005M/s items_per_second=8.00634M/s
   MatchSubstring                        258750625 ns    252653667 ns           
 3 bytes_per_second=62.7256M/s items_per_second=4.15025M/s
   SplitPattern                          299539709 ns    298784000 ns           
 2 bytes_per_second=53.0411M/s items_per_second=3.50948M/s
   TrimSingleAscii                       111507625 ns    111294667 ns           
 6 bytes_per_second=142.395M/s items_per_second=9.42162M/s
   TrimManyAscii                         203941069 ns    203470000 ns           
 3 bytes_per_second=77.8879M/s items_per_second=5.15347M/s
   MatchLike                             119806375 ns    119497500 ns           
 6 bytes_per_second=132.621M/s items_per_second=8.77488M/s
   MatchLikeSubstring                    248376431 ns    247746000 ns           
 3 bytes_per_second=63.9681M/s items_per_second=4.23246M/s
   MatchLikePrefix                        56100764 ns     55995583 ns           
12 bytes_per_second=283.019M/s items_per_second=18.726M/s
   MatchLikeSuffix                        56816561 ns     56097538 ns           
13 bytes_per_second=282.505M/s items_per_second=18.692M/s
   Utf8Lower                             122156556 ns    121713833 ns           
 6 bytes_per_second=130.206M/s items_per_second=8.61509M/s
   Utf8Upper                             122179403 ns    121698667 ns           
 6 bytes_per_second=130.222M/s items_per_second=8.61617M/s
   IsAlphaNumericUnicode                 410486979 ns    409009000 ns           
 2 bytes_per_second=38.7469M/s items_per_second=2.5637M/s
   TrimSingleUtf8                        111251986 ns    110930667 ns           
 6 bytes_per_second=142.863M/s items_per_second=9.45253M/s
   TrimManyUtf8                          304767895 ns    303984500 ns           
 2 bytes_per_second=52.1337M/s items_per_second=3.44944M/s
   BinaryJoinArrayScalar                    516491 ns       514441 ns         
1359 bytes_per_second=224.442M/s
   BinaryJoinArrayArray                     597666 ns       595395 ns         
1174 bytes_per_second=193.925M/s
   BinaryJoinElementWiseArrayScalar/2      3828987 ns      3817743 ns          
183 bytes_per_second=60.9898M/s
   BinaryJoinElementWiseArrayScalar/8      8424908 ns      8400627 ns           
83 bytes_per_second=111.188M/s
   BinaryJoinElementWiseArrayScalar/64    36747569 ns     32232043 ns           
23 bytes_per_second=232.082M/s
   BinaryJoinElementWiseArrayScalar/128   58483125 ns     54018571 ns           
14 bytes_per_second=276.848M/s
   BinaryJoinElementWiseArrayArray/2       2692385 ns      2591653 ns          
265 bytes_per_second=89.8436M/s
   BinaryJoinElementWiseArrayArray/8       7018530 ns      7000495 ns           
99 bytes_per_second=133.426M/s
   BinaryJoinElementWiseArrayArray/64     29864237 ns     29787478 ns           
23 bytes_per_second=251.128M/s
   BinaryJoinElementWiseArrayArray/128    49300289 ns     49028643 ns           
14 bytes_per_second=305.024M/s
   BinaryRepeat                          120564430 ns    120146000 ns           
 6 bytes_per_second=131.905M/s items_per_second=8.72751M/s
   ```
   
   </details>
   
   <details><summary>a</summary>
   
   ```
   Unable to determine clock rate from sysctl: hw.cpufrequency: No such file or 
directory
   This does not affect benchmark measurements, only the metadata output.
   2023-11-05T16:52:57+09:00
   Running 
/Users/lama/workspace/arrow-build-test/cpp/cmake-build-debug/debug/arrow-compute-scalar-string-benchmark
   Run on (10 X 24.1246 MHz CPU s)
   CPU Caches:
     L1 Data 64 KiB
     L1 Instruction 128 KiB
     L2 Unified 4096 KiB (x10)
   Load Average: 37.83, 16.60, 10.30
   ***WARNING*** Library was built as DEBUG. Timings may be affected.
   
-----------------------------------------------------------------------------------------------
   Benchmark                                     Time             CPU   
Iterations UserCounters...
   
-----------------------------------------------------------------------------------------------
   AsciiLower                             60577072 ns     46872800 ns           
15 bytes_per_second=338.103M/s items_per_second=22.3707M/s
   AsciiUpper                             48606701 ns     41226706 ns           
17 bytes_per_second=384.407M/s items_per_second=25.4344M/s
   IsAlphaNumericAscii                   119629299 ns    119414000 ns           
 6 bytes_per_second=132.713M/s items_per_second=8.78101M/s
   MatchSubstring                        257597486 ns    256771000 ns           
 3 bytes_per_second=61.7197M/s items_per_second=4.0837M/s
   SplitPattern                          300296125 ns    299404500 ns           
 2 bytes_per_second=52.9312M/s items_per_second=3.50221M/s
   TrimSingleAscii                       112323972 ns    111810167 ns           
 6 bytes_per_second=141.739M/s items_per_second=9.37818M/s
   TrimManyAscii                         203778403 ns    203120000 ns           
 3 bytes_per_second=78.0221M/s items_per_second=5.16235M/s
   MatchLike                             119820972 ns    119458833 ns           
 6 bytes_per_second=132.664M/s items_per_second=8.77772M/s
   MatchLikeSubstring                    256275458 ns    255825333 ns           
 3 bytes_per_second=61.9479M/s items_per_second=4.0988M/s
   MatchLikePrefix                        56712590 ns     56558500 ns           
12 bytes_per_second=280.203M/s items_per_second=18.5397M/s
   MatchLikeSuffix                        56969875 ns     56785167 ns           
12 bytes_per_second=279.084M/s items_per_second=18.4657M/s
   Utf8Lower                             121201930 ns    121057167 ns           
 6 bytes_per_second=130.912M/s items_per_second=8.66183M/s
   Utf8Upper                             122345653 ns    121983833 ns           
 6 bytes_per_second=129.918M/s items_per_second=8.59602M/s
   IsAlphaNumericUnicode                 413550229 ns    411320500 ns           
 2 bytes_per_second=38.5292M/s items_per_second=2.54929M/s
   TrimSingleUtf8                        113653875 ns    113339000 ns           
 6 bytes_per_second=139.827M/s items_per_second=9.25168M/s
   TrimManyUtf8                          304111230 ns    291555500 ns           
 2 bytes_per_second=54.3562M/s items_per_second=3.59649M/s
   BinaryJoinArrayScalar                    515313 ns       512924 ns         
1366 bytes_per_second=225.106M/s
   BinaryJoinArrayArray                     592849 ns       591778 ns         
1170 bytes_per_second=195.111M/s
   BinaryJoinElementWiseArrayScalar/2      3849662 ns      3802697 ns          
185 bytes_per_second=61.2311M/s
   BinaryJoinElementWiseArrayScalar/8      8359060 ns      8343250 ns           
84 bytes_per_second=111.952M/s
   BinaryJoinElementWiseArrayScalar/64    30720440 ns     30650478 ns           
23 bytes_per_second=244.057M/s
   BinaryJoinElementWiseArrayScalar/128   49606673 ns     49499643 ns           
14 bytes_per_second=302.122M/s
   BinaryJoinElementWiseArrayArray/2       2527602 ns      2521259 ns          
278 bytes_per_second=92.352M/s
   BinaryJoinElementWiseArrayArray/8       6932439 ns      6916228 ns          
101 bytes_per_second=135.051M/s
   BinaryJoinElementWiseArrayArray/64     29666691 ns     29603042 ns           
24 bytes_per_second=252.693M/s
   BinaryJoinElementWiseArrayArray/128    48173015 ns     48073286 ns           
14 bytes_per_second=311.086M/s
   BinaryRepeat                          120577007 ns    120241167 ns           
 6 bytes_per_second=131.8M/s items_per_second=8.72061M/s
   
   ```
   
   </details>
   
   
   <details><summary>B</summary>
   
   ```
   Unable to determine clock rate from sysctl: hw.cpufrequency: No such file or 
directory
   This does not affect benchmark measurements, only the metadata output.
   2023-11-05T16:55:46+09:00
   Running 
/Users/lama/workspace/arrow-build-test/cpp/cmake-build-debug/debug/arrow-compute-scalar-string-benchmark
   Run on (10 X 24.3912 MHz CPU s)
   CPU Caches:
     L1 Data 64 KiB
     L1 Instruction 128 KiB
     L2 Unified 4096 KiB (x10)
   Load Average: 21.24, 15.90, 11.03
   ***WARNING*** Library was built as DEBUG. Timings may be affected.
   
-----------------------------------------------------------------------------------------------
   Benchmark                                     Time             CPU   
Iterations UserCounters...
   
-----------------------------------------------------------------------------------------------
   AsciiLower                             66595109 ns     45477750 ns           
16 bytes_per_second=348.475M/s items_per_second=23.0569M/s
   AsciiUpper                             67166255 ns     41177118 ns           
17 bytes_per_second=384.87M/s items_per_second=25.465M/s
   IsAlphaNumericAscii                   162978063 ns    129192000 ns           
 6 bytes_per_second=122.669M/s items_per_second=8.11642M/s
   MatchSubstring                        254909944 ns    251145667 ns           
 3 bytes_per_second=63.1022M/s items_per_second=4.17517M/s
   SplitPattern                          306430188 ns    302196000 ns           
 2 bytes_per_second=52.4423M/s items_per_second=3.46985M/s
   TrimSingleAscii                       112436854 ns    112052667 ns           
 6 bytes_per_second=141.432M/s items_per_second=9.35789M/s
   TrimManyAscii                         208635278 ns    205369333 ns           
 3 bytes_per_second=77.1675M/s items_per_second=5.10581M/s
   MatchLike                             120709285 ns    120153000 ns           
 6 bytes_per_second=131.897M/s items_per_second=8.72701M/s
   MatchLikeSubstring                    252236653 ns    250617333 ns           
 3 bytes_per_second=63.2352M/s items_per_second=4.18397M/s
   MatchLikePrefix                        56806969 ns     56557917 ns           
12 bytes_per_second=280.206M/s items_per_second=18.5399M/s
   MatchLikeSuffix                        59267385 ns     57512250 ns           
12 bytes_per_second=275.556M/s items_per_second=18.2322M/s
   Utf8Lower                             122572944 ns    122257333 ns           
 6 bytes_per_second=129.627M/s items_per_second=8.57679M/s
   Utf8Upper                             122658451 ns    122209000 ns           
 6 bytes_per_second=129.678M/s items_per_second=8.58019M/s
   IsAlphaNumericUnicode                 410729333 ns    409563000 ns           
 2 bytes_per_second=38.6945M/s items_per_second=2.56023M/s
   TrimSingleUtf8                        111459104 ns    111060000 ns           
 6 bytes_per_second=142.696M/s items_per_second=9.44153M/s
   TrimManyUtf8                          305294500 ns    304472000 ns           
 2 bytes_per_second=52.0502M/s items_per_second=3.44392M/s
   BinaryJoinArrayScalar                    521329 ns       518370 ns         
1341 bytes_per_second=222.741M/s
   BinaryJoinArrayArray                     604294 ns       601321 ns         
1166 bytes_per_second=192.014M/s
   BinaryJoinElementWiseArrayScalar/2      3846224 ns      3830492 ns          
183 bytes_per_second=60.7868M/s
   BinaryJoinElementWiseArrayScalar/8      8438597 ns      8407434 ns           
83 bytes_per_second=111.097M/s
   BinaryJoinElementWiseArrayScalar/64    32029102 ns     31324273 ns           
22 bytes_per_second=238.808M/s
   BinaryJoinElementWiseArrayScalar/128   49774158 ns     49610786 ns           
14 bytes_per_second=301.445M/s
   BinaryJoinElementWiseArrayArray/2       2551518 ns      2541444 ns          
275 bytes_per_second=91.6186M/s
   BinaryJoinElementWiseArrayArray/8       7059063 ns      7008170 ns          
100 bytes_per_second=133.279M/s
   BinaryJoinElementWiseArrayArray/64     30176525 ns     29983304 ns           
23 bytes_per_second=249.488M/s
   BinaryJoinElementWiseArrayArray/128    48993896 ns     48834929 ns           
14 bytes_per_second=306.234M/s
   BinaryRepeat                          120613792 ns    120028000 ns           
 6 bytes_per_second=132.035M/s items_per_second=8.73609M/s
   ```
   
   </details>
   
   <details><summary>a</summary>
   
   ```
   Unable to determine clock rate from sysctl: hw.cpufrequency: No such file or 
directory
   This does not affect benchmark measurements, only the metadata output.
   2023-11-05T17:06:50+09:00
   Running 
/Users/lama/workspace/arrow-build-test/cpp/cmake-build-debug/debug/arrow-compute-scalar-string-benchmark
   Run on (10 X 24.2828 MHz CPU s)
   CPU Caches:
     L1 Data 64 KiB
     L1 Instruction 128 KiB
     L2 Unified 4096 KiB (x10)
   Load Average: 22.22, 12.26, 11.78
   ***WARNING*** Library was built as DEBUG. Timings may be affected.
   
-----------------------------------------------------------------------------------------------
   Benchmark                                     Time             CPU   
Iterations UserCounters...
   
-----------------------------------------------------------------------------------------------
   AsciiLower                             69841256 ns     46085733 ns           
15 bytes_per_second=343.877M/s items_per_second=22.7527M/s
   AsciiUpper                             56986850 ns     46607067 ns           
15 bytes_per_second=340.031M/s items_per_second=22.4982M/s
   IsAlphaNumericAscii                   150377437 ns    117138667 ns           
 6 bytes_per_second=135.291M/s items_per_second=8.95158M/s
   MatchSubstring                        505749417 ns    472646500 ns           
 2 bytes_per_second=33.53M/s items_per_second=2.21852M/s
   SplitPattern                         1847715750 ns   1804689000 ns           
 1 bytes_per_second=8.78148M/s items_per_second=581.029k/s
   TrimSingleAscii                       206645833 ns    205643000 ns           
 3 bytes_per_second=77.0648M/s items_per_second=5.09901M/s
   TrimManyAscii                         207149347 ns    205301333 ns           
 3 bytes_per_second=77.1931M/s items_per_second=5.1075M/s
   MatchLike                             131151854 ns    122571500 ns           
 6 bytes_per_second=129.295M/s items_per_second=8.55481M/s
   MatchLikeSubstring                    459364917 ns    456693500 ns           
 2 bytes_per_second=34.7013M/s items_per_second=2.29602M/s
   MatchLikePrefix                        57800965 ns     57385417 ns           
12 bytes_per_second=276.165M/s items_per_second=18.2725M/s
   MatchLikeSuffix                        58057163 ns     57391083 ns           
12 bytes_per_second=276.138M/s items_per_second=18.2707M/s
   Utf8Lower                             127273701 ns    123126167 ns           
 6 bytes_per_second=128.712M/s items_per_second=8.51627M/s
   Utf8Upper                             129544535 ns    123194833 ns           
 6 bytes_per_second=128.64M/s items_per_second=8.51153M/s
   IsAlphaNumericUnicode                 440119375 ns    415563000 ns           
 2 bytes_per_second=38.1358M/s items_per_second=2.52327M/s
   TrimSingleUtf8                        286792500 ns    279280667 ns           
 3 bytes_per_second=56.7452M/s items_per_second=3.75456M/s
   TrimManyUtf8                          281064542 ns    278604000 ns           
 3 bytes_per_second=56.883M/s items_per_second=3.76368M/s
   BinaryJoinArrayScalar                    520501 ns       517758 ns         
1359 bytes_per_second=223.004M/s
   BinaryJoinArrayArray                     609256 ns       601919 ns         
1152 bytes_per_second=191.824M/s
   BinaryJoinElementWiseArrayScalar/2      3831887 ns      3817383 ns          
183 bytes_per_second=60.9956M/s
   BinaryJoinElementWiseArrayScalar/8      8460215 ns      8416759 ns           
83 bytes_per_second=110.974M/s
   BinaryJoinElementWiseArrayScalar/64    30925404 ns     30820304 ns           
23 bytes_per_second=242.713M/s
   BinaryJoinElementWiseArrayScalar/128   51981167 ns     51192000 ns           
10 bytes_per_second=292.134M/s
   BinaryJoinElementWiseArrayArray/2       2568378 ns      2559942 ns          
274 bytes_per_second=90.9565M/s
   BinaryJoinElementWiseArrayArray/8       7007568 ns      6984750 ns          
100 bytes_per_second=133.726M/s
   BinaryJoinElementWiseArrayArray/64     29844184 ns     29741000 ns           
24 bytes_per_second=251.521M/s
   BinaryJoinElementWiseArrayArray/128    49258946 ns     48964357 ns           
14 bytes_per_second=305.425M/s
   BinaryRepeat                          123376778 ns    120404167 ns           
 6 bytes_per_second=131.622M/s items_per_second=8.7088M/s
   ```
   
   </details>
   
   <details><summary>Z-a</summary>
   
   ```
   Unable to determine clock rate from sysctl: hw.cpufrequency: No such file or 
directory
   This does not affect benchmark measurements, only the metadata output.
   2023-11-05T16:59:32+09:00
   Running 
/Users/lama/workspace/arrow-build-test/cpp/cmake-build-debug/debug/arrow-compute-scalar-string-benchmark
   Run on (10 X 24.1209 MHz CPU s)
   CPU Caches:
     L1 Data 64 KiB
     L1 Instruction 128 KiB
     L2 Unified 4096 KiB (x10)
   Load Average: 26.56, 20.79, 14.29
   ***WARNING*** Library was built as DEBUG. Timings may be affected.
   
-----------------------------------------------------------------------------------------------
   Benchmark                                     Time             CPU   
Iterations UserCounters...
   
-----------------------------------------------------------------------------------------------
   AsciiLower                             86322557 ns     66717455 ns           
11 bytes_per_second=237.537M/s items_per_second=15.7167M/s
   AsciiUpper                             60021861 ns     57794750 ns           
12 bytes_per_second=274.209M/s items_per_second=18.1431M/s
   IsAlphaNumericAscii                    20754428 ns     20625882 ns           
34 bytes_per_second=768.347M/s items_per_second=50.8379M/s
   MatchSubstring                        289741979 ns    288741500 ns           
 2 bytes_per_second=54.8859M/s items_per_second=3.63154M/s
   SplitPattern                          600066833 ns    597824000 ns           
 1 bytes_per_second=26.5092M/s items_per_second=1.75399M/s
   TrimSingleAscii                       115720187 ns    115507333 ns           
 6 bytes_per_second=137.202M/s items_per_second=9.078M/s
   TrimManyAscii                         116993021 ns    116707167 ns           
 6 bytes_per_second=135.792M/s items_per_second=8.98468M/s
   MatchLike                             123895333 ns    121384167 ns           
 6 bytes_per_second=130.559M/s items_per_second=8.63849M/s
   MatchLikeSubstring                    290632938 ns    290035000 ns           
 2 bytes_per_second=54.6411M/s items_per_second=3.61534M/s
   MatchLikePrefix                        57807208 ns     57681333 ns           
12 bytes_per_second=274.748M/s items_per_second=18.1788M/s
   MatchLikeSuffix                        57836149 ns     57712833 ns           
12 bytes_per_second=274.598M/s items_per_second=18.1689M/s
   Utf8Lower                             125754833 ns    125529400 ns           
 5 bytes_per_second=126.248M/s items_per_second=8.35323M/s
   Utf8Upper                             125341347 ns    125139000 ns           
 6 bytes_per_second=126.642M/s items_per_second=8.37929M/s
   IsAlphaNumericUnicode                  39587384 ns     39492222 ns           
18 bytes_per_second=401.29M/s items_per_second=26.5515M/s
   TrimSingleUtf8                        114925729 ns    114602333 ns           
 6 bytes_per_second=138.286M/s items_per_second=9.14969M/s
   TrimManyUtf8                          114509111 ns    114236333 ns           
 6 bytes_per_second=138.729M/s items_per_second=9.17901M/s
   BinaryJoinArrayScalar                    510474 ns       509409 ns         
1365 bytes_per_second=226.659M/s
   BinaryJoinArrayArray                     590959 ns       589773 ns         
1183 bytes_per_second=195.774M/s
   BinaryJoinElementWiseArrayScalar/2      4062842 ns      3789581 ns          
186 bytes_per_second=61.4431M/s
   BinaryJoinElementWiseArrayScalar/8      8409721 ns      8381446 ns           
83 bytes_per_second=111.442M/s
   BinaryJoinElementWiseArrayScalar/64    30689185 ns     30588696 ns           
23 bytes_per_second=244.55M/s
   BinaryJoinElementWiseArrayScalar/128   49766131 ns     49647214 ns           
14 bytes_per_second=301.224M/s
   BinaryJoinElementWiseArrayArray/2       2467776 ns      2464942 ns          
277 bytes_per_second=94.462M/s
   BinaryJoinElementWiseArrayArray/8       6784096 ns      6775165 ns          
103 bytes_per_second=137.863M/s
   BinaryJoinElementWiseArrayArray/64     29109743 ns     29048958 ns           
24 bytes_per_second=257.513M/s
   BinaryJoinElementWiseArrayArray/128    47438644 ns     47354667 ns           
15 bytes_per_second=315.807M/s
   BinaryRepeat                          114823000 ns    114782167 ns           
 6 bytes_per_second=138.069M/s items_per_second=9.13536M/s
   ```
   
   </details>
   
   <details><summary>A-B</summary>
   
   ```
   Unable to determine clock rate from sysctl: hw.cpufrequency: No such file or 
directory
   This does not affect benchmark measurements, only the metadata output.
   2023-11-05T17:18:08+09:00
   Running 
/Users/lama/workspace/arrow-build-test/cpp/cmake-build-debug/debug/arrow-compute-scalar-string-benchmark
   Run on (10 X 24.0567 MHz CPU s)
   CPU Caches:
     L1 Data 64 KiB
     L1 Instruction 128 KiB
     L2 Unified 4096 KiB (x10)
   Load Average: 21.43, 12.73, 11.72
   ***WARNING*** Library was built as DEBUG. Timings may be affected.
   
-----------------------------------------------------------------------------------------------
   Benchmark                                     Time             CPU   
Iterations UserCounters...
   
-----------------------------------------------------------------------------------------------
   AsciiLower                             71967039 ns     49053800 ns           
15 bytes_per_second=323.071M/s items_per_second=21.376M/s
   AsciiUpper                             39829296 ns     39489500 ns           
18 bytes_per_second=401.318M/s items_per_second=26.5533M/s
   IsAlphaNumericAscii                   122967611 ns    121176500 ns           
 6 bytes_per_second=130.783M/s items_per_second=8.65329M/s
   MatchSubstring                        251616319 ns    250154667 ns           
 3 bytes_per_second=63.3522M/s items_per_second=4.19171M/s
   SplitPattern                          300475188 ns    299781000 ns           
 2 bytes_per_second=52.8647M/s items_per_second=3.49781M/s
   TrimSingleAscii                       112082438 ns    111340667 ns           
 6 bytes_per_second=142.337M/s items_per_second=9.41773M/s
   TrimManyAscii                         203422375 ns    202994333 ns           
 3 bytes_per_second=78.0704M/s items_per_second=5.16554M/s
   MatchLike                             119299465 ns    119062167 ns           
 6 bytes_per_second=133.106M/s items_per_second=8.80696M/s
   MatchLikeSubstring                    248962139 ns    248359333 ns           
 3 bytes_per_second=63.8101M/s items_per_second=4.22201M/s
   MatchLikePrefix                        56438840 ns     56303750 ns           
12 bytes_per_second=281.47M/s items_per_second=18.6236M/s
   MatchLikeSuffix                        56384566 ns     56263333 ns           
12 bytes_per_second=281.673M/s items_per_second=18.6369M/s
   Utf8Lower                             122655479 ns    122189667 ns           
 6 bytes_per_second=129.699M/s items_per_second=8.58154M/s
   Utf8Upper                             121992771 ns    121751667 ns           
 6 bytes_per_second=130.165M/s items_per_second=8.61242M/s
   IsAlphaNumericUnicode                 409912125 ns    408886000 ns           
 2 bytes_per_second=38.7586M/s items_per_second=2.56447M/s
   TrimSingleUtf8                        111437299 ns    111046667 ns           
 6 bytes_per_second=142.713M/s items_per_second=9.44266M/s
   TrimManyUtf8                          279231319 ns    278481667 ns           
 3 bytes_per_second=56.908M/s items_per_second=3.76533M/s
   BinaryJoinArrayScalar                    521854 ns       520399 ns         
1336 bytes_per_second=221.873M/s
   BinaryJoinArrayArray                     600541 ns       599092 ns         
1168 bytes_per_second=192.729M/s
   BinaryJoinElementWiseArrayScalar/2      3832028 ns      3821415 ns          
183 bytes_per_second=60.9312M/s
   BinaryJoinElementWiseArrayScalar/8      8415257 ns      8385398 ns           
83 bytes_per_second=111.389M/s
   BinaryJoinElementWiseArrayScalar/64    31034620 ns     30932609 ns           
23 bytes_per_second=241.831M/s
   BinaryJoinElementWiseArrayScalar/128   51910233 ns     50558200 ns           
10 bytes_per_second=295.796M/s
   BinaryJoinElementWiseArrayArray/2       2543797 ns      2536232 ns          
276 bytes_per_second=91.8068M/s
   BinaryJoinElementWiseArrayArray/8       7002950 ns      6978510 ns          
100 bytes_per_second=133.846M/s
   BinaryJoinElementWiseArrayArray/64     30062612 ns     29991696 ns           
23 bytes_per_second=249.418M/s
   BinaryJoinElementWiseArrayArray/128    48614661 ns     48454429 ns           
14 bytes_per_second=308.639M/s
   BinaryRepeat                          117739181 ns    117578000 ns           
 6 bytes_per_second=134.786M/s items_per_second=8.91813M/s
   ```
   
   </details>
   
   <details><summary>a-b</summary>
   
   ```
   Unable to determine clock rate from sysctl: hw.cpufrequency: No such file or 
directory
   This does not affect benchmark measurements, only the metadata output.
   2023-11-05T17:13:17+09:00
   Running 
/Users/lama/workspace/arrow-build-test/cpp/cmake-build-debug/debug/arrow-compute-scalar-string-benchmark
   Run on (10 X 24.0135 MHz CPU s)
   CPU Caches:
     L1 Data 64 KiB
     L1 Instruction 128 KiB
     L2 Unified 4096 KiB (x10)
   Load Average: 26.45, 12.28, 11.53
   ***WARNING*** Library was built as DEBUG. Timings may be affected.
   
-----------------------------------------------------------------------------------------------
   Benchmark                                     Time             CPU   
Iterations UserCounters...
   
-----------------------------------------------------------------------------------------------
   AsciiLower                             93316692 ns     48147667 ns           
15 bytes_per_second=329.151M/s items_per_second=21.7783M/s
   AsciiUpper                             46178678 ns     45217267 ns           
15 bytes_per_second=350.482M/s items_per_second=23.1897M/s
   IsAlphaNumericAscii                   119479292 ns    112159667 ns           
 6 bytes_per_second=141.297M/s items_per_second=9.34896M/s
   MatchSubstring                        423356271 ns    420812000 ns           
 2 bytes_per_second=37.6601M/s items_per_second=2.49179M/s
   SplitPattern                         1397767917 ns   1383606000 ns           
 1 bytes_per_second=11.454M/s items_per_second=757.857k/s
   TrimSingleAscii                       189197188 ns    176411500 ns           
 4 bytes_per_second=89.8345M/s items_per_second=5.94392M/s
   TrimManyAscii                         224340180 ns    208932667 ns           
 3 bytes_per_second=75.8514M/s items_per_second=5.01873M/s
   MatchLike                             265022208 ns    257496667 ns           
 3 bytes_per_second=61.5458M/s items_per_second=4.07219M/s
   MatchLikeSubstring                    421082313 ns    418003000 ns           
 2 bytes_per_second=37.9132M/s items_per_second=2.50854M/s
   MatchLikePrefix                        65303189 ns     64958000 ns           
11 bytes_per_second=243.971M/s items_per_second=16.1424M/s
   MatchLikeSuffix                        65367530 ns     64915545 ns           
11 bytes_per_second=244.13M/s items_per_second=16.1529M/s
   Utf8Lower                             123366854 ns    122773167 ns           
 6 bytes_per_second=129.082M/s items_per_second=8.54076M/s
   Utf8Upper                             123336771 ns    122494500 ns           
 6 bytes_per_second=129.376M/s items_per_second=8.56019M/s
   IsAlphaNumericUnicode                 430325105 ns    411080500 ns           
 2 bytes_per_second=38.5517M/s items_per_second=2.55078M/s
   TrimSingleUtf8                        153566483 ns    152935200 ns           
 5 bytes_per_second=103.625M/s items_per_second=6.85634M/s
   TrimManyUtf8                          282400486 ns    280322667 ns           
 3 bytes_per_second=56.5343M/s items_per_second=3.7406M/s
   BinaryJoinArrayScalar                    523523 ns       519276 ns         
1349 bytes_per_second=222.353M/s
   BinaryJoinArrayArray                     611899 ns       605256 ns         
1154 bytes_per_second=190.766M/s
   BinaryJoinElementWiseArrayScalar/2      3893473 ns      3867033 ns          
182 bytes_per_second=60.2124M/s
   BinaryJoinElementWiseArrayScalar/8      8498821 ns      8422482 ns           
83 bytes_per_second=110.899M/s
   BinaryJoinElementWiseArrayScalar/64    36238366 ns     31760478 ns           
23 bytes_per_second=235.528M/s
   BinaryJoinElementWiseArrayScalar/128   50431283 ns     50079100 ns           
10 bytes_per_second=298.626M/s
   BinaryJoinElementWiseArrayArray/2       2631463 ns      2579765 ns          
272 bytes_per_second=90.2576M/s
   BinaryJoinElementWiseArrayArray/8       7075472 ns      7027343 ns           
99 bytes_per_second=132.916M/s
   BinaryJoinElementWiseArrayArray/64     30109264 ns     29964913 ns           
23 bytes_per_second=249.641M/s
   BinaryJoinElementWiseArrayArray/128    50799277 ns     49716357 ns           
14 bytes_per_second=300.805M/s
   BinaryRepeat                          118798889 ns    118317833 ns           
 6 bytes_per_second=133.943M/s items_per_second=8.86237M/s
   ```
   
   </details>


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