Well, you can't parse 50MB in a second... You should create index for you mailbox, and load it instead of parsing mailbox for every request. I would use a database for this purpose. But if you want to use the file, take a look onto make_index method in Mail::MboxParser. It would require some additional work, as you probably want to index more information than just message number, but it's a something you can start with.

In reply to Re: Mail::MboxParser pegs the CPU by zwon
in thread Mail::MboxParser pegs the CPU by oko1

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