[issue47005] Improve performance of bytes_repeat
New submission from Pieter Eendebak : 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 -- components: Interpreter Core messages: 415077 nosy: pieter.eendebak priority: normal severity: normal status: open title: Improve performance of bytes_repeat type: performance versions: Python 3.11 ___ Python tracker <https://bugs.python.org/issue47005> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue47070] Improve performance of array_inplace_repeat
New submission from Pieter Eendebak : The array_inplace_repeat is inefficient for small arrays and a high number of repeats. This can be improved by using the same approach as in https://bugs.python.org/issue47005 -- components: Interpreter Core messages: 415572 nosy: pieter.eendebak priority: normal severity: normal status: open title: Improve performance of array_inplace_repeat type: performance versions: Python 3.11 ___ Python tracker <https://bugs.python.org/issue47070> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue47070] Improve performance of array_inplace_repeat
Change by Pieter Eendebak : -- keywords: +patch pull_requests: +30088 stage: -> patch review pull_request: https://github.com/python/cpython/pull/31999 ___ Python tracker <https://bugs.python.org/issue47070> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue47091] Improve performance of list and tuple repeat methods
New submission from Pieter Eendebak : Approach is similar to https://github.com/python/cpython/pull/31856 and https://github.com/python/cpython/pull/31999 -- components: Interpreter Core messages: 415762 nosy: pieter.eendebak priority: normal severity: normal status: open title: Improve performance of list and tuple repeat methods versions: Python 3.11 ___ Python tracker <https://bugs.python.org/issue47091> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue47091] Improve performance of list and tuple repeat methods
Change by Pieter Eendebak : -- keywords: +patch pull_requests: +30135 stage: -> patch review pull_request: https://github.com/python/cpython/pull/32045 ___ Python tracker <https://bugs.python.org/issue47091> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue47091] Improve performance of list and tuple repeat methods
Pieter Eendebak added the comment: The special case of a repeat with n=1 does not use memcpy. An implementation with it showed no performance improvement. -- ___ Python tracker <https://bugs.python.org/issue47091> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue47110] Refactor bytearray strip methods
New submission from Pieter Eendebak : The bytearray strip, lstrip and rstrip methods contain a lot of duplicated code. -- components: Interpreter Core messages: 415939 nosy: pieter.eendebak priority: normal severity: normal status: open title: Refactor bytearray strip methods versions: Python 3.11 ___ Python tracker <https://bugs.python.org/issue47110> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue47110] Refactor bytearray strip methods
Change by Pieter Eendebak : -- keywords: +patch pull_requests: +30180 stage: -> patch review pull_request: https://github.com/python/cpython/pull/32096 ___ Python tracker <https://bugs.python.org/issue47110> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue47116] Use _PyLong_FromUnsignedChar in bytearrayobject.c
New submission from Pieter Eendebak : In https://github.com/python/cpython/pull/31867 the method _PyLong_FromUnsignedChar was introduced for faster conversion of byteaarray elements. We can use the method in more places -- components: Interpreter Core messages: 415991 nosy: pieter.eendebak priority: normal severity: normal status: open title: Use _PyLong_FromUnsignedChar in bytearrayobject.c versions: Python 3.11 ___ Python tracker <https://bugs.python.org/issue47116> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue47116] Use _PyLong_FromUnsignedChar in bytearrayobject.c
Change by Pieter Eendebak : -- keywords: +patch pull_requests: +30187 stage: -> patch review pull_request: https://github.com/python/cpython/pull/32110 ___ Python tracker <https://bugs.python.org/issue47116> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue47251] Merge BINARY_SUBSCR_LIST_INT with BINARY_SUBSCR_LIST_TUPLE
New submission from Pieter Eendebak : The implementations of BINARY_SUBSCR_LIST_INT and BINARY_SUBSCR_TUPLE_INT are almost identical. They can be merged, so there is one opcode less and the code is shared. -- components: Interpreter Core messages: 416937 nosy: pieter.eendebak priority: normal severity: normal status: open title: Merge BINARY_SUBSCR_LIST_INT with BINARY_SUBSCR_LIST_TUPLE versions: Python 3.11 ___ Python tracker <https://bugs.python.org/issue47251> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue47251] Merge BINARY_SUBSCR_LIST_INT with BINARY_SUBSCR_LIST_TUPLE
Change by Pieter Eendebak : -- keywords: +patch pull_requests: +30429 stage: -> patch review pull_request: https://github.com/python/cpython/pull/32404 ___ Python tracker <https://bugs.python.org/issue47251> ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
