RE: Moving ExecCGI to mod_perl - performance and custom 'modules' [EXT]

As welsey said – try Registry, that was the standard way of using mod_perl to cache perl in the server  – but your problem might be due to the note in PerlRun…

https://perl.apache.org/docs/2.0/api/ModPerl/PerlRun.html#Description
META: document that for now we don't chdir() into the script's dir, because it affects the whole process under threads. ModPerl::PerlRunPrefork<https://perl.apache.org/docs/2.0/api/ModPerl/PerlRunPrefork.html> should be used by those who run only under prefork MPM.
{tbh most people don’t use mod perl under threads anyway as there isn’t really a gain from using them}

It suggests you use ModPerl/PerlRunPrefork – as this does an additional step to cd to the script directory – which might be your issue….

From: Steven Haigh <[email protected]>
Sent: 07 February 2021 01:00
To: [email protected]
Subject: Moving ExecCGI to mod_perl - performance and custom 'modules' [EXT]

Hi all,

So for many years I've been slack and writing perl scripts to do various things - but never needed more than the normal apache +ExecCGI and Template Toolkit.

One of my sites has become a bit more popular, so I'd like to spend a bit of time on performance. Currently, I'm seeing ~300-400ms of what I believe to be execution time of the script loading, running, and then blatting its output to STDOUT and the browser can go do its thing.

I believe most of the delay would be to do with loading perl, its modules etc etc

I know that the current trend would be to re-write the entire site in a more modern, daemon based solution - and I started down the Mojolicious path - but the amount of re-writing to save 1/3rd of a second seems to be excessive

Would I be correct in thinking that mod_perl would help in this case?

I did try a basic test, but I have a 'use functions' in all my scripts that loads a .pm with some global vars and a lot of common subs - and for whatever reason (can't find anything on Google as to why), none of the subs are recognised in the main script when loaded via ModPerl::PerlRun.

So throwing it out to the list - am I on the right track? wasting my time? or just a simple mistake?

--
Steven Haigh 📧 [email protected]<mailto:[email protected]> 💻 https://www.crc.id.au [crc.id.au]<https://urldefense.proofpoint.com/v2/url?u=https-3A__www.crc.id.au_&d=DwMFaQ&c=D7ByGjS34AllFgecYw0iC6Zq7qlm8uclZFI0SqQnqBo&r=oH2yp0ge1ecj4oDX0XM7vQ&m=bosoTbkecbnrPukObNK-5Duc1p3JTllIM7_FHhBYKW4&s=vQDi0ezyEZDOz86GVraerPdT76UjN2in3UdPh8fglRM&e=>



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