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v0.5.1
v0.5.1
https://github.com/python/cpython
Revision 69e1309fd4faf7e5e4f74f54678f9648316aae37 authored by Jeffrey Yasskin on 28 February 2008, 06:09:19 UTC, committed by Jeffrey Yasskin on 28 February 2008, 06:09:19 UTC
new thread had started. At least on my MacBook Pro, that wound up sleeping for a full 10ms (probably 1 jiffy). By using an Event instead, we can be absolutely certain that the thread has started, and return more quickly (217us). Before: $ ./python.exe -m timeit -s 'from threading import Thread' 't = Thread(); t.start(); t.join()' 100 loops, best of 3: 10.3 msec per loop $ ./python.exe -m timeit -s 'from threading import Thread; t = Thread()' 't.isAlive()' 1000000 loops, best of 3: 0.47 usec per loop After: $ ./python.exe -m timeit -s 'from threading import Thread' 't = Thread(); t.start(); t.join()' 1000 loops, best of 3: 217 usec per loop $ ./python.exe -m timeit -s 'from threading import Thread; t = Thread()' 't.isAlive()' 1000000 loops, best of 3: 0.86 usec per loop To be fair, the 10ms isn't CPU time, and other threads including the spawned one get to run during it. There are also some slightly more complicated ways to get back the .4us in isAlive() if we want.
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Tip revision: 69e1309fd4faf7e5e4f74f54678f9648316aae37 authored by Jeffrey Yasskin on 28 February 2008, 06:09:19 UTC
Thread.start() used sleep(0.000001) to make sure it didn't return before the
Thread.start() used sleep(0.000001) to make sure it didn't return before the
Tip revision: 69e1309
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| .hgtags | -rw-r--r-- | 3.2 KB |
| LICENSE | -rw-r--r-- | 13.4 KB |
| Makefile.pre.in | -rw-r--r-- | 36.1 KB |
| README | -rw-r--r-- | 54.2 KB |
| configure | -rwxr-xr-x | 642.5 KB |
| configure.in | -rw-r--r-- | 98.0 KB |
| install-sh | -rwxr-xr-x | 7.0 KB |
| pyconfig.h.in | -rw-r--r-- | 28.1 KB |
| setup.py | -rw-r--r-- | 71.8 KB |
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