EllisLab/CodeIgniter — comment on commit 7bb95dff569f465ad8887404c2f9d5304a2ff5b3
File: system/libraries/Cache/drivers/Cache_apc.php line 72
By twobee:

$_SERVER['REQUEST_TIME'] is usally the time when the script was
called. There might be a slight difference between the time() and the
'request time'. But if you have high traffic sites calling time() is a
slight performance issue, because most times $_SERVER['REQUEST_TIME']
is equal to the output of time().

Might be not the case for some users, but I would guess there are
several users out there who have high traffic sites and therefore
every ms counts. :)

On 18 January 2012 19:00, Timothy Warren

wrote:
> $_SERVER['REQUEST_TIME'] is the time posted to the server as opposed to the time the script runs.
>
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