[TYPO3-english] Resolving script timeout reasons

[Simon Justesen]

Hi,

I'm developing a website based on TYPO3 on my local dev machine. Every 
now and then, I encounter this error:

Fatal error: Maximum execution time of 30 seconds exceeded in 
D:\t3lib\class.t3lib_lock.php on line 159

I could increase the allowed execution time in php.ini, but ultimately 
the site is going live on a server where the 30 second limit is standard.

My question is: How can I diagnose what is causing the script to time 
out? I even tried to go back to the original working code to no avail, 
there's still something blocking - even after clearing the cache.

Thanks,

Simon