New submission from Boris FELD <lothiral...@gmail.com>:
Hello everyone, I juste tried to launch the stringbench on python3.2 and
python3.3 dev versions and some unicode tests run slower in python3.3 than in
python3.2.
I cc the two raw output of both runs. I also extracted most interesting data
(all the tests with more than 20% of performance regression):
- ("A"*1000).find("B") (*1000): -30.379747%
- "Hello\t \t".rstrip() (*1000): -33.333333%
- "this\nis\na\ntest\n".rsplit("\n") (*1000): -23.437500%
- "\nHello!\n".strip() (*1000): -33.333333%
- dna.split("ACTAT") (*10): -21.066667%
- "Andrew".endswith("w") (*1000): -23.529412%
- "...text.with.2000.lines...replace("\n", " ") (*10): -37.668161%
- "\t \tHello".rstrip() (*1000): -33.333333%
- ("A"*1000).rpartition("A") (*1000): -21.212121%
- ("Here are some words. "*2).split() (*1000): -22.105263%
- "Hello!\n".rstrip() (*1000): -35.714286%
- "B" in "A"*1000 (*1000): -32.089552%
- "Hello!\n".strip() (*1000): -35.714286%
- "\nHello!".strip() (*1000): -28.571429%
- "this\nis\na\ntest\n".split("\n") (*1000): -23.437500%
- "Andrew".startswith("A") (*1000): -20.588235%
- "\nHello!".rstrip() (*1000): -35.714286%
- "Andrew".endswith("Andrew") (*1000): -22.857143%
- "Andrew".endswith("Anders") (*1000): -23.529412%
- "The %(k1)s is %(k2)s the %(k3)s."%{"k1":"x","k2":"y","k3":"z",} (*1000):
-49.411765%
- "Andrew".startswith("Anders") (*1000): -23.529412%
- "this--is--a--test--of--the--emergency--broadcast--system".split("--")
(*1000): -22.429907%
- "Andrew"+"Dalke" (*1000): -23.076923%
----------
assignee: collinwinter
components: Benchmarks
files: stringbench_log_cpython3.2
messages: 149681
nosy: Boris.FELD, collinwinter
priority: normal
severity: normal
status: open
title: Unicode performance regression in python3.3 vs python3.2
type: performance
versions: Python 3.2, Python 3.3
Added file: http://bugs.python.org/file23991/stringbench_log_cpython3.2
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<http://bugs.python.org/issue13621>
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