Re: Question on code profiling

On Thu, Jul 23, 2009 at 4:51 PM, Robert Cummings<robert@interjinn.com> wrote: > Andrew Ballard wrote: >> >> I'm trying to profile a site on our development server to see why it >> takes around 4 seconds to generate a pretty basic page. I installed >> xdebug to use for the profiling, and now I'm really confused. Even >> though it takes around 4 seconds to build the entire page, the profile >> says that the total processing time is around 416ms. I thought it >> might be calls to require_once/include/include_once. While they are >> significant (around 46%), it says they only account for 193ms. What >> could account for that much difference between what xdebug calculates >> versus the total elapsed time? >> >> Andrew > > Any embedded remote elements in it like that punk Google analytics which I > often see lagging my page requests on various sites? > > Cheers, > Rob. Nope. Basically it connects to a database to load an ACL (which at this point is empty, so even that isn't doing much work) and spits out "Hello World". I timed the page top-to-bottom using microtime to make sure it wasn't network latency, and the elapsed time it calculated is very close to the time I see displayed by the YSlow browser extension (around 4 sec.). The server uses eAccelerator with both caching and optimization enabled. This is another one of those ZendFramework sites I'm setting up. (Last time, I brought the execution time down considerably by moving the framework from a network drive to a local drive, but that's already in place this time.) A simple <?php phpinfo() ?> page executes very quickly (about 0.01seconds timed w/microtime, under a half second recorded in YSlow), so I can't see that this could be held up any by IIS (yes, it's a Windows server). Even if the page is getting bogged down in calls to include(_once)/require(_once), shouldn't that time still be reflected in the profile calculation? I thought xdebug was supposed to be a pretty good profiler. If it calculating the time correctly, where are the other ~3.6 seconds going? Andrew