•Re: Benchmark, -s versus schwartzian

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Re^2: Benchmark, -s versus schwartzian by Darby (Sexton) on Aug 22, 2004 at 20:42 UTC
Aha! Moving the glob out of the loops (using Ambrus's code) gave the expected results: `/etc/ contains 311 files Benchmark: running Ordinary, Schwartzian, Strange for at least 5 CPU s +econds... Ordinary: 5 wallclock secs ( 1.47 usr + 4.09 sys = 5.56 CPU) @ 99 +.28/s (n=552) Schwartzian: 5 wallclock secs ( 3.95 usr + 1.13 sys = 5.08 CPU) @ 3 +33.46/s (n=1694) Strange: 5 wallclock secs ( 4.01 usr + 1.12 sys = 5.13 CPU) @ 35 +9.06/s (n=1842)` [download] `/bin/ contains 111 files Benchmark: running Ordinary, Schwartzian, Strange for at least 5 CPU s +econds... Ordinary: 5 wallclock secs ( 1.30 usr + 3.98 sys = 5.28 CPU) @ 34 +8.86/s (n=1842) Schwartzian: 6 wallclock secs ( 3.97 usr + 1.45 sys = 5.42 CPU) @ 9 +79.89/s (n=5311) Strange: 5 wallclock secs ( 3.84 usr + 1.46 sys = 5.30 CPU) @ 11 +45.85/s (n=6073)` [download] One thing, If I used "/usr/bin" or any other path with a '/' in the middle it went haywire. Thanks a lot for all the help everybody!	[reply] [d/l] [select]
Re^3: Benchmark, -s versus schwartzian by ambrus (Abbot) on Aug 23, 2004 at 08:20 UTC
This still does not explain the original results. I think that even with the glob in the loop, the Schwartzian transform should be faster. (I couldn't reproduce those results, the Schwartzian was faster for me even with your original code.) One thing, If I used "/usr/bin" or any other path with a '/' in the middle it went haywire. That's wierd.	[reply]
Re^2: Benchmark, -s versus schwartzian by Aristotle (Chancellor) on Aug 22, 2004 at 18:40 UTC
Something to change in the next revision of the book? `:-)` Makeshifts last the longest.	[reply]
•Re^3: Benchmark, -s versus schwartzian by merlyn (Sage) on Aug 23, 2004 at 01:09 UTC
Well, I meant what I said in the answer. On my laptop, doing the glob inside the loop on 33 elements made the ST the winner. But yes, suggesting that the filenames be captured once might make sense for the 2ed of the book. -- Randal L. Schwartz, Perl hacker Be sure to read my standard disclaimer if this is a reply.	[reply]