STINNER Victor added the comment:
> Did you tested for numerous shared int and floats? [1000] * 1000000 and
> [1000.0] * 1000000? AFAIK this was important use cases for adding 3 or 4
> versions.
Here are new benchmarks on Python 3.4 with:
Integers: [1000] * 1000000
Floats: [1000.0] * 1000000
Integers, without the patch:
dumps v3: 62.8 ms
data size v3: 4882.8 kB
loads v3: 10.7 ms
Integers, with the patch:
dumps v3: 18.6 ms (-70%)
data size v3: 4882.8 kB (same size)
loads v3: 27.7 ms (+158%)
Floats, without the patch:
dumps v3: 62.5 ms
data size v3: 4882.8 kB
loads v3: 11.0 ms
Floats, with the patch:
dumps v3: 29.3 ms (-53%)
data size v3: 8789.1 kB (+80%)
loads v3: 25.5 ms (+132%)
The version 3 was added by:
---
changeset: 82816:01372117a5b4
user: Kristján Valur Jónsson <swesk...@gmail.com>
date: Tue Mar 19 18:02:10 2013 -0700
files: Doc/library/marshal.rst Include/marshal.h Lib/test/test_marshal.py
Misc/NEWS Python/marshal.c
description:
Issue #16475: Support object instancing, recursion and interned strings in
marshal
---
This issue tells about "sharing string constants, common tuples, even common
code objects", not sharing numbers.
For real data, here are interesting numbers:
http://bugs.python.org/issue16475#msg176013
Integers only represent 4.8% of serialized data, and only 8.2% of these
integers can be shared. (Floats represent 0.29%.) Whereas strings repsent 58%
and 57% can be shared.
----------
_______________________________________
Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue20416>
_______________________________________
_______________________________________________
Python-bugs-list mailing list
Unsubscribe:
https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
