Low Memory system.module for Drupal 6.10

I have created a low memory version of system.module for Drupal 6.10 which can be found here. I found it gave a modest performance improvement with low load performance testing on my development machine. Where it shines is under high load relative to tight memory conditions.

With ab -c 100 -n 1000 http://example.com/user on a real site, applying this patch gave somewhere around an 18% reduction in average time per request.