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Speed up bytearray creation from list and tuple #91149

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kumaraditya303 opened this issue Mar 12, 2022 · 2 comments
Closed

Speed up bytearray creation from list and tuple #91149

kumaraditya303 opened this issue Mar 12, 2022 · 2 comments
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3.11 only security fixes interpreter-core (Objects, Python, Grammar, and Parser dirs) performance Performance or resource usage

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@kumaraditya303
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BPO 46993
Nosy @gvanrossum, @asvetlov, @kumaraditya303
PRs
  • bpo-46993: Speed up bytearray creation from list and tuple #31834
    		•

    Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.

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    GitHub fields:

    assignee = None
closed_at = <Date 2022-03-15.14:49:22.422>
created_at = <Date 2022-03-12.09:40:17.081>
labels = ['interpreter-core', '3.11', 'performance']
title = 'Speed up bytearray creation from list and tuple'
updated_at = <Date 2022-03-15.14:49:22.422>
user = 'https://github.com/kumaraditya303'

    bugs.python.org fields:

    activity = <Date 2022-03-15.14:49:22.422>
actor = 'asvetlov'
assignee = 'none'
closed = True
closed_date = <Date 2022-03-15.14:49:22.422>
closer = 'asvetlov'
components = ['Interpreter Core']
creation = <Date 2022-03-12.09:40:17.081>
creator = 'kumaraditya'
dependencies = []
files = []
hgrepos = []
issue_num = 46993
keywords = []
message_count = 2.0
messages = ['414987', '415244']
nosy_count = 3.0
nosy_names = ['gvanrossum', 'asvetlov', 'kumaraditya']
pr_nums = ['31834']
priority = 'normal'
resolution = 'fixed'
stage = 'resolved'
status = 'closed'
superseder = None
type = 'performance'
url = 'https://bugs.python.org/issue46993'
versions = ['Python 3.11']
    @kumaraditya303
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    The attached PR speeds up bytearray creation from list and tuple.

    Benchmark (uses pyperf):
    -----------------------------------------------------

    import pyperf

runner = pyperf.Runner()
runner.timeit(name="bench bytearray",
              stmt="bytearray([42]*10000)",)

    Results:

    -----------------------------------------------------
    Mean +- std dev: [base] 74.8 us +- 5.5 us -> [patch] 53.2 us +- 3.3 us: 1.41x faster
    -----------------------------------------------------

    @kumaraditya303 kumaraditya303 added 3.11 only security fixes interpreter-core (Objects, Python, Grammar, and Parser dirs) performance Performance or resource usage labels Mar 12, 2022
    @asvetlov
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    New changeset 6dfe09f by Kumar Aditya in branch 'main':
    bpo-46993: Speed up bytearray creation from list and tuple (GH-31834)
    6dfe09f

    @ezio-melotti ezio-melotti transferred this issue from another repository Apr 10, 2022
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    @asvetlov @kumaraditya303