samuelcolvin commented on PR #6128:
URL: https://github.com/apache/arrow-rs/pull/6128#issuecomment-2254497323
I can the benchmarks on the exact same spec of GCP machine
(`c2-standard-8`), and got slightly different results:
```
group contains-performance
master
----- --------------------
------
ilike_utf8 scalar complex 1.00 305.2±1.28µs
? ?/sec 1.00 305.7±0.70µs ? ?/sec
ilike_utf8 scalar contains 1.11 1685.4±4.02µs
? ?/sec 1.00 1515.0±8.44µs ? ?/sec
ilike_utf8 scalar ends with 1.00 233.9±0.71µs
? ?/sec 1.00 234.3±0.31µs ? ?/sec
ilike_utf8 scalar equals 1.16 248.6±0.28µs
? ?/sec 1.00 214.2±0.27µs ? ?/sec
ilike_utf8 scalar starts with 1.11 279.6±0.95µs
? ?/sec 1.00 251.2±0.28µs ? ?/sec
ilike_utf8_scalar_dyn dictionary[10] string[4]) 1.00 49.1±0.22µs
? ?/sec 1.79 88.0±0.15µs ? ?/sec
like_utf8 scalar complex 1.00 287.3±1.08µs
? ?/sec 1.00 288.4±0.90µs ? ?/sec
like_utf8 scalar contains 1.23 458.9±11.91µs
? ?/sec 1.00 373.6±0.36µs ? ?/sec
like_utf8 scalar ends with 1.00 234.4±0.21µs
? ?/sec 1.00 234.3±0.54µs ? ?/sec
like_utf8 scalar equals 1.00 217.1±0.20µs
? ?/sec 1.00 217.1±0.20µs ? ?/sec
like_utf8 scalar starts with 1.00 234.4±0.59µs
? ?/sec 1.08 253.5±0.24µs ? ?/sec
like_utf8_scalar_dyn dictionary[10] string[4]) 1.00 49.0±0.07µs
? ?/sec 1.80 88.0±0.15µs ? ?/sec
like_utf8view scalar complex 1.01 531.2±1.22ms
? ?/sec 1.00 523.6±3.52ms ? ?/sec
like_utf8view scalar contains 1.00 134.6±0.37ms
? ?/sec 2.97 399.7±0.46ms ? ?/sec
like_utf8view scalar ends with 1.01 59.0±0.21ms
? ?/sec 1.00 58.5±0.12ms ? ?/sec
like_utf8view scalar equals 1.03 30.1±0.05ms
? ?/sec 1.00 29.4±0.09ms ? ?/sec
like_utf8view scalar starts with 1.00 54.0±0.12ms
? ?/sec 1.02 55.2±0.13ms ? ?/sec
nilike_utf8 scalar complex 1.00 304.9±0.70µs
? ?/sec 1.00 305.2±0.59µs ? ?/sec
nilike_utf8 scalar contains 1.12 1684.7±5.21µs
? ?/sec 1.00 1509.5±5.93µs ? ?/sec
nilike_utf8 scalar ends with 1.00 234.2±1.14µs
? ?/sec 1.00 234.2±0.50µs ? ?/sec
nilike_utf8 scalar equals 1.16 248.7±0.32µs
? ?/sec 1.00 214.2±0.43µs ? ?/sec
nilike_utf8 scalar starts with 1.11 279.5±0.26µs
? ?/sec 1.00 251.3±0.47µs ? ?/sec
nlike_utf8 scalar complex 1.00 285.8±0.44µs
? ?/sec 1.01 287.2±0.62µs ? ?/sec
nlike_utf8 scalar contains 1.24 461.9±10.51µs
? ?/sec 1.00 373.9±0.67µs ? ?/sec
nlike_utf8 scalar ends with 1.00 234.2±0.20µs
? ?/sec 1.00 234.3±0.25µs ? ?/sec
nlike_utf8 scalar equals 1.00 217.1±0.20µs
? ?/sec 1.00 217.0±0.25µs ? ?/sec
nlike_utf8 scalar starts with 1.00 234.3±0.22µs
? ?/sec 1.08 253.6±0.36µs ? ?/sec
```
The only cases which should have changed in this PR are:
```
group contains-performance
master
----- --------------------
------
like_utf8 scalar contains 1.23 458.9±11.91µs
? ?/sec 1.00 373.6±0.36µs ? ?/sec
like_utf8view scalar contains 1.00 134.6±0.37ms
? ?/sec 2.97 399.7±0.46ms ? ?/sec
nlike_utf8 scalar contains 1.24 461.9±10.51µs
? ?/sec 1.00 373.9±0.67µs ? ?/sec
```
I'll try to work out why the first and last are marginally slower with this
PR.
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