Message204480
| Author |
serhiy.storchaka |
| Recipients |
Arfrever, alexandre.vassalotti, larry, pitrou, serhiy.storchaka, vstinner |
| Date |
2013年11月26日.14:55:47 |
| SpamBayes Score |
-1.0 |
| Marked as misclassified |
Yes |
| Message-id |
<1706595.fi3yOiHNNE@raxxla> |
| In-reply-to |
<1385471681.15.0.764637205195.issue19780@psf.upfronthosting.co.za> |
| Content |
> If it's an optimizatio, can I see some benchmarks numbers? :-)
First create two files. Run unpatched Python:
./python -c "import pickle, lzma; data = [bytes([i])*2**16 for i in
range(256)]; with open('test.pickle4', 'wb'): pickle.dump(data, f, 4)"
Then run the same with patched Python for 'test.pickle4opt'.
Now benchmark loading.
$ ./python -m timeit "import pickle;" "with open('test.pickle4', 'rb',
buffering=0) as f: pickle.load(f)"
10 loops, best of 3: 52.9 msec per loop
$ ./python -m timeit "import pickle;" "with open('test.pickle4opt', 'rb',
buffering=0) as f: pickle.load(f)"
10 loops, best of 3: 48.9 msec per loop
The difference is about 5%. On faster computers with slower files (sockets?) it
should be larger. |
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