currently i try to optimize our system so that the landing-page if it
does not contain forms and when no user is logged in could be cached
with APCu which works fine so far
there is still a early session_start(); and while delay that would be
probably possible like it's happening currently with database connection
on-demand
but there are some important things written in $_SESSION which i can't
delay and the sample below shows that they would get lost in case it's
not a cache hit
___________________________________
<?php declare(strict_types=1);
if(!empty($_SESSION['test']))
{
echo $_SESSION['test'];
}
$_SESSION['test'] = 'test';
session_start();
___________________________________
if that could work in the way that session_start() keeps the current
state of $_SESSION if not empty it would be possible to put the
APCU-Read and if exit($apcu_content); before session_start() which would
gain another 30% performance
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