Issue47248
Created on 2022-04-07 11:30 by Mark.Shannon, last changed 2022-04-11 14:59 by admin.
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| msg416923 - (view) | Author: Mark Shannon (Mark.Shannon) *  |
Date: 2022-04-07 11:30 | |
The 3 regular expression benchmarks in the pyperformance suite, regex_v8, regex_effbot and regex_dna show slowdowns between 3% and 10%. Looking at the stats, nothing seems wrong with specialization or the memory optimizations. Which strongly suggests a regression in the sre module itself, but I can't say so for certain. |
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| msg416928 - (view) | Author: Ma Lin (malin) * | Date: 2022-04-07 14:21 | |
Could you give the two versions? I will do a git bisect. I tested 356997c~1 and 356997c [1], msvc2022 non-pgo release build: # regex_dna ### an +- std dev: 151 ms +- 1 ms -> 152 ms +- 1 ms: 1.01x slower t significant # regex_effbot ### an +- std dev: 2.47 ms +- 0.01 ms -> 2.46 ms +- 0.02 ms: 1.00x faster t significant # regex_v8 ### an +- std dev: 21.7 ms +- 0.1 ms -> 22.4 ms +- 0.1 ms: 1.03x slower gnificant (t=-30.82) https://github.com/python/cpython/commit/356997cccc21a3391175d20e9ef03d434675b496 |
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| msg416959 - (view) | Author: Dennis Sweeney (Dennis Sweeney) * |
Date: 2022-04-08 06:04 | |
Possibly related to the new atomic grouping support from GH-31982? |
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| msg416961 - (view) | Author: Ma Lin (malin) * | Date: 2022-04-08 07:22 | |
> Possibly related to the new atomic grouping support from GH-31982? It seems not likely. I will do some benchmarks for this issue, more information (version/platform) is welcome. |
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| History | |||
|---|---|---|---|
| Date | User | Action | Args |
| 2022-04-11 14:59:58 | admin | set | github: 91404 |
| 2022-04-08 07:22:53 | malin | set | messages: + msg416961 |
| 2022-04-08 06:04:50 | Dennis Sweeney | set | nosy:
+ Dennis Sweeney, serhiy.storchaka messages: + msg416959 |
| 2022-04-07 14:21:03 | malin | set | nosy:
+ malin messages: + msg416928 |
| 2022-04-07 11:30:33 | Mark.Shannon | create | |