-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Antoine Pitrou wrote: >> I don't really know how this test works, so I won't claim to understand >> the results either. However, here you go: > > Thanks. > > Interesting results. I wonder what they would be like on a multi-core > machine. The GIL seems to behave perfectly on your setup (no performance > degradation due to concurrency, and zero latencies). >
C:\downloads>C:\Python26\python.exe ccbench.py - --- Throughput --- Pi calculation (Python) threads=1: 691 iterations/s. threads=2: 400 ( 57 %) threads=3: 453 ( 65 %) threads=4: 467 ( 67 %) ^- seems to have some contention regular expression (C) threads=1: 592 iterations/s. threads=2: 598 ( 101 %) threads=3: 587 ( 99 %) threads=4: 586 ( 99 %) bz2 compression (C) threads=1: 536 iterations/s. threads=2: 1056 ( 196 %) threads=3: 1040 ( 193 %) threads=4: 1060 ( 197 %) ^- seems to properly show that I have 2 cores here. - --- Latency --- Background CPU task: Pi calculation (Python) CPU threads=0: 0 ms. (std dev: 0 ms.) CPU threads=1: 0 ms. (std dev: 0 ms.) CPU threads=2: 0 ms. (std dev: 0 ms.) CPU threads=3: 0 ms. (std dev: 0 ms.) CPU threads=4: 0 ms. (std dev: 0 ms.) Background CPU task: regular expression (C) CPU threads=0: 0 ms. (std dev: 0 ms.) CPU threads=1: 38 ms. (std dev: 18 ms.) CPU threads=2: 173 ms. (std dev: 77 ms.) CPU threads=3: 518 ms. (std dev: 264 ms.) CPU threads=4: 661 ms. (std dev: 343 ms.) Background CPU task: bz2 compression (C) CPU threads=0: 0 ms. (std dev: 0 ms.) CPU threads=1: 0 ms. (std dev: 0 ms.) CPU threads=2: 0 ms. (std dev: 0 ms.) CPU threads=3: 0 ms. (std dev: 0 ms.) CPU threads=4: 0 ms. (std dev: 0 ms.) John =;-> -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.9 (Cygwin) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iEYEARECAAYFAkrfJawACgkQJdeBCYSNAANQlgCgwx0TCLh7YhLSJxkfOuMi1/YF XhkAoIONtdP0rR1YW0nDza+wpKpAlInd =L4WZ -----END PGP SIGNATURE----- _______________________________________________ Python-Dev mailing list Python-Dev@python.org http://mail.python.org/mailman/listinfo/python-dev Unsubscribe: http://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com
