Re: Linux::Smaps

On Tue, Mar 29, 2011 at 18:52, Torsten Förtsch <[email protected]> wrote:

> Meanwhile Ævar uploaded his own quite specialized smaps parser
> (Linux::Smaps::Tiny) to CPAN. Here is what I get in comparison:
>
> perl -Ilib -MLinux::Smaps -MLinux::Smaps::Tiny \
>     -MBenchmark=:all,:hireswallclock -e '
>  cmpthese timethese -5, {
>    tiny=>sub{Linux::Smaps::Tiny::get_smaps_summary},
>    smaps=>sub{scalar Linux::Smaps->new->all}
>  }
> '
> Benchmark: running smaps, tiny for at least 5 CPU seconds...
>     smaps: 5.0982 wallclock secs ( 4.56 usr +  0.47 sys =  5.03 CPU) @ 365.81/s (n=1840)
>      tiny: 5.51047 wallclock secs ( 4.63 usr +  0.83 sys =  5.46 CPU) @ 591.58/s (n=3230)
>       Rate smaps  tiny
> smaps 366/s    --  -38%
> tiny  592/s   62%    --

I've just uploaded 0.06 of Linux::Smaps::Tiny. It'll use C XS code to
parse the file by default, falling back to the pure-perl version if
there's no compiler on the system:

    $ perl -Ilib -MLinux::Smaps -MLinux::Smaps::Tiny
-MLinux::Smaps::Tiny::PP     -MBenchmark=:all,:hireswallclock -e '
     cmpthese timethese -5, {
       tiny=>sub{Linux::Smaps::Tiny::get_smaps_summary},
       tiny_pp=>sub{Linux::Smaps::Tiny::PP::__get_smaps_summary},
       smaps=>sub{scalar Linux::Smaps->new->all}
     }
    '
    Benchmark: running smaps, tiny, tiny_pp for at least 5 CPU seconds...
         smaps: 5.3729 wallclock secs ( 4.42 usr +  0.93 sys =  5.35
CPU) @ 792.52/s (n=4240)
          tiny: 5.42358 wallclock secs ( 2.94 usr +  2.46 sys =  5.40
CPU) @ 2082.59/s (n=11246)
       tiny_pp: 5.39001 wallclock secs ( 4.02 usr +  1.36 sys =  5.38
CPU) @ 1029.18/s (n=5537)
              Rate   smaps tiny_pp    tiny
    smaps    793/s      --    -23%    -62%
    tiny_pp 1029/s     30%      --    -51%
    tiny    2083/s    163%    102%      --