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Created on 2022-03-13 19:01 by pieter.eendebak, last changed 2022-04-11 14:59 by admin. This issue is now closed.
| Pull Requests | |||
|---|---|---|---|
| URL | Status | Linked | Edit |
| PR 31856 | merged | python-dev, 2022-03-13 19:07 | |
| Messages (3) | |||
|---|---|---|---|
| msg415077 - (view) | Author: Pieter Eendebak (pieter.eendebak) * | Date: 2022-03-13 19:01 | |
The bytearray_repeat and bytearray_irepeat are inefficient for small arrays and a high number of repeats. This can be improved by using the same approach is in the corresponding bytes_repeat method. Microbenchmark: python -m pyperf timeit "b=bytearray([1,2,])*100" Mean +- std dev: [base100] 479 ns +- 29 ns -> [patch100] 274 ns +- 18 ns: 1.75x faster python -m pyperf timeit "b=bytearray([1,2,])*1000" Mean +- std dev: [base1000] 2.58 us +- 0.18 us -> [patch1000] 399 ns +- 26 ns: 6.46x faster |
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| msg415457 - (view) | Author: Dennis Sweeney (Dennis Sweeney) *  |
Date: 2022-03-17 23:10 | |
New changeset ac8308d3eaf2526318c1bbf13d4a214fd24605d2 by Pieter Eendebak in branch 'main': bpo-47005: Improve performance of bytearray_repeat and bytearray_irepeat (GH-31856) https://github.com/python/cpython/commit/ac8308d3eaf2526318c1bbf13d4a214fd24605d2 |
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| msg415458 - (view) | Author: Dennis Sweeney (Dennis Sweeney) * |
Date: 2022-03-17 23:11 | |
Thanks for the contribution -- that's a really nice speedup. |
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| History | |||
|---|---|---|---|
| Date | User | Action | Args |
| 2022-04-11 14:59:57 | admin | set | github: 91161 |
| 2022-03-17 23:11:56 | Dennis Sweeney | set | status: open -> closed resolution: fixed stage: patch review -> resolved |
| 2022-03-17 23:11:46 | Dennis Sweeney | set | messages: + msg415458 |
| 2022-03-17 23:10:55 | Dennis Sweeney | set | nosy:
+ Dennis Sweeney messages: + msg415457 |
| 2022-03-13 19:07:01 | python-dev | set | keywords:
+ patch nosy: + python-dev pull_requests: + pull_request29954 stage: patch review |
| 2022-03-13 19:01:26 | pieter.eendebak | create | |