STINNER Victor added the comment:
bench_list_repr.py: benchmark script. It would be interesting to run it on
Windows, performances of realloc() may be different. Result on my Linux box:
Common platform:
Python unicode implementation: PEP 393
Platform: Linux-3.9.4-200.fc18.x86_64-x86_64-with-fedora-18-Spherical_Cow
Timer info: namespace(adjustable=False,
implementation='clock_gettime(CLOCK_MONOTONIC)', monotonic=True,
resolution=1e-09)
Timer: time.perf_counter
CFLAGS: -Wno-unused-result -Werror=declaration-after-statement -DNDEBUG -g
-fwrapv -O3 -Wall -Wstrict-prototypes
Bits: int=32, long=64, long long=64, size_t=64, void*=64
CPU model: Intel(R) Core(TM) i7-2600 CPU @ 3.40GHz
Platform of campaign pyaccu:
SCM: hg revision=fafe20297927 tag=tip branch=default date="2013-11-07 00:53
+0100"
Date: 2013-11-07 01:40:23
Python version: 3.4.0a4+ (default:fafe20297927, Nov 7 2013, 01:40:19) [GCC
4.7.2 20121109 (Red Hat 4.7.2-8)]
Timer precision: 36 ns
Platform of campaign writer:
Timer precision: 40 ns
SCM: hg revision=fafe20297927+ tag=tip branch=default date="2013-11-07 00:53
+0100"
Date: 2013-11-07 01:39:59
Python version: 3.4.0a4+ (default:fafe20297927+, Nov 7 2013, 01:38:30) [GCC
4.7.2 20121109 (Red Hat 4.7.2-8)]
-----------------------------+-------------+---------------
Tests | pyaccu | writer
-----------------------------+-------------+---------------
list("a") | 308 ns (*) | 259 ns (-16%)
list("abc") | 489 ns (*) | 468 ns
["a"]*(100) | 8.17 us (*) | 7.8 us
["abc"]*(100) | 8.46 us (*) | 8.88 us
["a" * 100]*(100) | 35.2 us (*) | 36.2 us
["a"]*(10**6) | 91.4 ms (*) | 77.3 ms (-15%)
["abc"]*(10**6) | 96.3 ms (*) | 85.2 ms (-11%)
["a" * 100]*(10**5) | 46.8 ms (*) | 35.1 ms (-25%)
list(range(10**6)) | 105 ms (*) | 96.9 ms (-8%)
list(map(str, range(10**6))) | 108 ms (*) | 88.7 ms (-18%)
-----------------------------+-------------+---------------
Total | 448 ms (*) | 383 ms (-14%)
-----------------------------+-------------+---------------
----------
Added file: http://bugs.python.org/file32521/bench_list_repr.py
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Python tracker <[email protected]>
<http://bugs.python.org/issue19513>
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