Increasing PHP Instructions Per Second

[cwarn23]

I have made a PHP script which takes days to execute (Web Article Generator) and is there any way that I can make the while loops do more Instructions Per Second using php. Because when executing the script, the servers resources are very low (15% memory & about 9% of cpus) which means the server has plenty of room for a faster execution time. The only thing that I can think of so far is to have a page with 16 iframes all executing a separate while loop of the same php applet but I really need a PHP solution.
If you have any suggestions for increasing the Scripts Instructions Per Second or making the execution time faster then please post them.

[Will Gresham]

You can increase the memory limit in PHP which may help with the problem, see http://www.ducea.com/2008/02/14/increase-php-memory-limit/

If PHP is installed on a remotely managed server, this may not be an option depending on the build options used.

[cwarn23]

ini_set('memory_limit','384M');

Surprisingly adding the line above seems to help a little but not tremendously. But is there anything which directly relates to the execution speed or speeds up the execution time to a much faster speed?

[PoA]

Assume you have hardware that meets to run your script.

If so,
1. Optimize your SQL.
2. Install memcache extension in PHP.

Hope it helps.

[cwarn23]

Thanks for the replies but I have just found out that it is mainly mysql query's that slow down the script big time. So I will try to use arrays and will try out memcache if memcache is a default php library.

[R0bb0b]

Another option is(I've never done it before but it should work) addresses by an article that I read about six months ago regarding php multi threading. This can be done with an <img> tag. For instance, if you want to send any number of parallel threads on their own, you can create an html page with several <img src="processor.php?var1=var1value&var2=var2value" /> and then do a javascript redirect at the bottom to continue processing. It would probably take some working with to perfect the process but if used correctly could probably cut processing time drastically.