dbatomic commented on code in PR #45816:
URL: https://github.com/apache/spark/pull/45816#discussion_r1549960451
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sql/core/benchmarks/CollationBenchmark-results.txt:
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@@ -2,26 +2,26 @@ OpenJDK 64-Bit Server VM 17.0.10+7-LTS on Linux
6.5.0-1016-azure
AMD EPYC 7763 64-Core Processor
collation unit benchmarks - equalsFunction: Best Time(ms) Avg Time(ms)
Stdev(ms) Rate(M/s) Per Row(ns) Relative
--------------------------------------------------------------------------------------------------------------------------
-UTF8_BINARY_LCASE 34122 34152
42 0.0 341224.2 1.0X
-UNICODE 4520 4522
2 0.0 45201.8 7.5X
-UTF8_BINARY 4524 4526
2 0.0 45243.0 7.5X
-UNICODE_CI 52706 52711
7 0.0 527056.1 0.6X
+UTF8_BINARY_LCASE 8006 8022
24 0.0 80056.6 1.0X
+UNICODE 3151 3152
3 0.0 31505.3 2.5X
+UTF8_BINARY 3152 3164
17 0.0 31517.9 2.5X
+UNICODE_CI 54159 54258
140 0.0 541591.6 0.1X
OpenJDK 64-Bit Server VM 17.0.10+7-LTS on Linux 6.5.0-1016-azure
AMD EPYC 7763 64-Core Processor
collation unit benchmarks - compareFunction: Best Time(ms) Avg Time(ms)
Stdev(ms) Rate(M/s) Per Row(ns) Relative
---------------------------------------------------------------------------------------------------------------------------
-UTF8_BINARY_LCASE 33467 33474
10 0.0 334671.7 1.0X
-UNICODE 51168 51168
1 0.0 511677.4 0.7X
-UTF8_BINARY 5561 5593
45 0.0 55610.9 6.0X
-UNICODE_CI 51929 51955
36 0.0 519291.8 0.6X
+UTF8_BINARY_LCASE 11169 11175
8 0.0 111691.2 1.0X
+UNICODE 49021 49052
45 0.0 490209.1 0.2X
+UTF8_BINARY 6415 6415
0 0.0 64145.8 1.7X
+UNICODE_CI 50373 50385
18 0.0 503725.4 0.2X
OpenJDK 64-Bit Server VM 17.0.10+7-LTS on Linux 6.5.0-1016-azure
AMD EPYC 7763 64-Core Processor
collation unit benchmarks - hashFunction: Best Time(ms) Avg Time(ms)
Stdev(ms) Rate(M/s) Per Row(ns) Relative
------------------------------------------------------------------------------------------------------------------------
-UTF8_BINARY_LCASE 22079 22083
5 0.0 220786.7 1.0X
-UNICODE 177636 177709
103 0.0 1776363.9 0.1X
-UTF8_BINARY 11954 11956
3 0.0 119536.7 1.8X
-UNICODE_CI 158014 158038
35 0.0 1580135.7 0.1X
+UTF8_BINARY_LCASE 24485 24506
30 0.0 244846.2 1.0X
Review Comment:
We can do the same trick for hash as well? e.g. iterate, take single byte
code point, convert to lcase and pass it to hasher?
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