The -V of my ASPerl: 
d:\Web-Dev\arrays>perl -V
Summary of my perl5 (revision 5 version 10 subversion 0) configuration
+:
  Platform:
    osname=MSWin32, osvers=5.00, archname=MSWin32-x86-multi-thread

Characteristics of this binary (from libperl):
  Compile-time options: MULTIPLICITY PERL_DONT_CREATE_GVSV
                        PERL_IMPLICIT_CONTEXT PERL_IMPLICIT_SYS
                        PERL_MALLOC_WRAP PL_OP_SLAB_ALLOC USE_ITHREADS
                        USE_LARGE_FILES USE_PERLIO USE_SITECUSTOMIZE
  Locally applied patches:
        ActivePerl Build 1004 [287188]
        33741 avoids segfaults invoking S_raise_signal() (on Linux)
        33763 Win32 process ids can have more than 16 bits
        32809 Load 'loadable object' with non-default file extension
        32728 64-bit fix for Time::Local
  Built under MSWin32
  Compiled at Sep  3 2008 13:16:37
  @INC:
    C:/Perl/site/lib
    C:/Perl/lib
    .

[download]
I'm not sure as to how i can look closer here. Suggestions as to what tests i can run are welcome. Meanwhile, here's snapshots of both, done with Procmon and NYTProf: http://drop.io/perl_performance

In reply to Re^4: Performance oddity when splitting a huge file into an AoA by Xenofur
in thread Performance oddity when splitting a huge file into an AoA by Xenofur

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