Re^3: Perl/Cgi : how to delete file after leaving original myscript.cgi?

In that case, you will have to:

find a way to speed-up the generation of the hash; or
go for the "cron job" approach; or
do something totally different (but it is difficult to help you here as we have no idea what exactly you are trying to do -- could you post some code or perhaps a link to the web-site where the script is running?)

CountZero

"If you have four groups working on a compiler, you'll get a 4-pass compiler." - Conway's Law

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