Bård Farstad
Tuesday 17 April 2007
I wrote a blog last year about optimizing Apache, PHP and APC for the new Macs with Intel CPUs. At that time I could not get the ICC compiler to work in my setup, but now I have gotten the new soon to be released Intel C++ compiler version 10 from the guys at Intel and things are working much better now. I used the same machine and same setup as in my last post just with the new Intel compiler installed.
The installation itself is quite simple just click through the wizard and when you are done you need to export some environment variables and set the CC compiler variable:
source /opt/intel/cc/10.0.012/bin/iccvars.sh export CC=/opt/intel/cc/10.0.012/bin/icc
Then you compile Apache, PHP and APC as normal. I blogged about how to compile Apache and PHP earlier.
I did the same basic test as last time but now with eZ Publish 3.9. The results when running the system with GCC:
Requests per second: 26.29 [#/sec] (mean)
With ICC compiled webserver environment I get the following results:
Requests per second: 28.85 [#/sec] (mean)
This is an additional performance improvement of 9.7% with caching enabled. When doing more CPU intensive work the difference is more noticeable so I measured template processing of a complex page before and after and this is the results:
Template processing with GCC: 1.0160sec Template processing with ICC: 0.8382sec % difference: 21%
This means that the CPU intensive operations with eZ Publish is boosted about 21% while the more cached operations are boosted about 10%. This is quite good especially when you consider the price Apple charges for a 20% faster CPU. The ICC compiler for Mac is selling for $399 so you have to consider the cost of the optimized software vs the cost of hardware.
UPDATE: I already did some tests with ICC using Linux 32 and 64 bits os:
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