[issue5885] uuid.uuid1() is too slow
Wang Chun
report at bugs.python.org
Thu Apr 30 12:13:36 CEST 2009
New submission from Wang Chun <yaohua2000 at gmail.com>:
uuid.uuid1() currently uses two different ways to generate a uuid. If
the system call "uuid_generate_time" is available, uuid1() uses the
system call via the ctypes interface, otherwise, it uses pure Python
code to generate a uuid. The problem is, the C interface
"uuid_generate_time" is even slower than the Python code. The ctypes
interface is too slow. According to my test, it took 55 microseconds to
generate a uuid via ctypes interface but only 45 microseconds via the
Python code. I also tried to test the performance of the
"uuid_generate_time" C API itself. It takes C code 12 microseconds. Most
of the time were wasted on ctypes. I believe we need to drop ctypes and
write a Python extensions in C for this job.
----------
components: Library (Lib)
messages: 86840
nosy: wangchun
severity: normal
status: open
title: uuid.uuid1() is too slow
type: performance
versions: Python 2.4, Python 2.5, Python 2.6, Python 2.7, Python 3.0, Python 3.1
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<http://bugs.python.org/issue5885>
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