I'm working on a log file parser, it works on a bunch of small files. I have a few sets of files from various sources and I need to verify they match, by first checking the file size. The thing is, there's about 15,000 of them, stored locally. Here's a snippet: 
while($file = lc(readdir DIR))
{
  if($file =~ /\.log$/)
  {
    $filesize{$file} = -s $file;
  }
}

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It's the -s bit that slows down the program, the stat takes about 5 mins to execute on 10,000 files, while 'ls' throws a listing up in less than 10 secs, and similar performance for Windows 'dir'. I need this perl to be portable though, so is there a faster way to get this without having to parse shell commands? And can some explain why stat is so slow?

In reply to -s takes too long on 15,000 files by ishk0

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