Re: RE on lines read from in-memory scalar is very slow

Not enough info!

Two possible guesses

your real regex is worse than O(n) with n the length of text, alone one .* could force it to O(n²)
your "in memory file" doesn't fit into memory and is forcing the system to swap. And FS operations are slow.

Cheers Rolf
_{(addicted to the Perl Programming Language :)

see Wikisyntax for the Monastery}

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