Perl taking a long time to exit? Freeing memory?

[Jeff AA]

Hi folks,

I have a Perl script that creates a large hash, from a collection of
files. I am running Perl 5.6.1 on SMP Linux 2.4.18, top shows my process
using up to 700MB of memory (which is fine on our servers). I have
noticed though that when perl hits my 
  exit 0;
line, the process pauses for up to two minutes, and pushes CPU
utilisation on one of the CPUs up to >99%

Any clues? I wondered if Perl was doing garbage collection, or if it was
freeing loads of small chunks of memory or something?

Is there anything I can do to speed up whatever is going on?

Thanks in advance
Jeff


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