Brothers,
I am continuing some of my file maintenance scripts, and noticed that either Windows or Perl has some severe speed issues while working with tens of thousands of files in a directory.
It takes 30 seconds, to 5 minutes to read in the list of files depending on the size, 10k files, or 400k files roughly. I know Windows, and especially NTFS does not perform well with that number, but I was looking for a faster directory reading function.
It appears VBScript can do a "getnext" on files, without getting in the full list. Is there something like that available in Perl?
Its likely I am not reading the directory correctly, but I can't find the difference between opendir and readdir, and just using chdir and doing a foreach loop.
See my code below:
use strict;
use POSIX;
use File::Copy;
use File::Basename;
use File::stat;

my $src;
my $dst;

print "\nEnter Source Directory: ";
chomp($src = <STDIN>);

$dst = $src;
$dst =~ s/inbox/queue/g;
print "\nDESTINATION DIRECTORY SET TO: $dst\n";

chdir $src || die "Can't chdir to !\n" ;
my $count;
my $limit;
print "\nEnter File Limit: ";
chomp($limit = <STDIN>)

$count = 1;
for  my $file (<*.imap>)
  {
      $count = $count + 1;
      my ($name,$path,$suffix) = fileparse($file,"\.imap") ;
    my $info = stat($file);
    my $datestamp = strftime("%Y%m%d", localtime($info->mtime));
    mkdir "$dst\\$datestamp" or "Error making Directory $!\n";
    print "\n Moving \"$file\" >> $dst\\$datestamp";
    move $file,"$dst\\$datestamp\\$name$suffix" or warn "Cannot copy $
+file $!\n";
    if($count > $limit)
    {
        print "\n \nFile Limit Reached. Stopping\n";
        exit;}
  }

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In reply to Fast file and directory operations by SkullOne

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