[development] Patch: path.module performance improvement

[Wim Leers]

Hi,

yup, yet another desperate call for review. I just need another small  
review to get this patch (hopefully) marked as RTBC. It has been  
tested thoroughly already!

What does it do?
- how: provide the ability to use no optimization at all, a blacklist  
or a whitelist of Drupal paths, to reduce the number of queries  
drupal_lookup_path() has to perform
- default: a very safe blacklist
- UI: none, to avoid confusion for the average user. The UI will be  
provided by a contrib module.
- performance improvement: from 55.07 reqs/sec to 61.46 reqs/sec,  
which is 11.6% more (using the default). These numbers come from  
benchmarks that you can see in follow-up #72. The total number of  
queries per page dropped about 20% (absolute numbers: between 10 and  
100 less queries). Of course this all depends on your setup.

Conclusion:
- this patch gives a "free" performance boost to all path.module  
users, the difference will be larger for more complex sites
- if you're knowledgeable enough to use the UI for this module, you  
can increase that performance gain even further

Link: http://drupal.org/node/106559

Wim Leers



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