On Wed, Aug 17, 2005 at 12:00:18PM -0700, Philippe M. Chiasson wrote:
> This somewhat simplistic benchmark seems to indicate there actually is a
> performance hit to using that form of my statement
<snip>
> $> perl-5.8.6 bench-my.pl
> declared 127166/s -- -6%
> normal 134590/s 6% --
$ perl5.8.6 ~/tmp/foo.plx
Rate declared normal
declared 162068/s -- -1%
normal 163959/s 1% --
$ perl5.8.6 ~/tmp/foo.plx
Rate declared normal
declared 162444/s -- -0%
normal 162474/s 0% --
$ perl5.8.6 ~/tmp/foo.plx
Rate declared normal
declared 162103/s -- -0%
normal 162893/s 0% --
$ perl5.6.2 ~/tmp/foo.plx
Benchmark: running declared, normal, each for at least 15 CPU seconds...
declared: 19 wallclock secs (15.56 usr + 0.00 sys = 15.56 CPU) @ 119003.86/s
(n=1851700)
normal: 18 wallclock secs (15.35 usr + 0.09 sys = 15.44 CPU) @ 121247.47/s
(n=1872061)
Rate declared normal
declared 119004/s -- -2%
normal 121247/s 2% --
$ perl5.6.2 ~/tmp/foo.plx
Benchmark: running declared, normal, each for at least 15 CPU seconds...
declared: 18 wallclock secs (14.92 usr + 0.09 sys = 15.01 CPU) @ 124462.43/s
(n=1868181)
normal: 18 wallclock secs (15.55 usr + 0.03 sys = 15.58 CPU) @ 116665.02/s
(n=1817641)
Rate normal declared
normal 116665/s -- -6%
declared 124462/s 7% --
$ perl5.6.2 ~/tmp/foo.plx
Benchmark: running declared, normal, each for at least 15 CPU seconds...
declared: 17 wallclock secs (15.94 usr + 0.00 sys = 15.94 CPU) @ 120326.35/s
(n=1918002)
normal: 16 wallclock secs (15.62 usr + 0.03 sys = 15.65 CPU) @ 120341.15/s
(n=1883339)
Rate declared normal
declared 120326/s -- -0%
normal 120341/s 0% --
No significant difference from where I'm sitting. Different OSs, different
compilers, different versions of Perl and a heavy dose of Benchmark.pm
flutter.
--
Michael G Schwern [EMAIL PROTECTED] http://www.pobox.com/~schwern
Don't try the paranormal until you know what's normal.
-- "Lords and Ladies" by Terry Prachett
