Flame Graphs Show Why Fast 404 Is Important for Drupal Performance
The Fast 404 Drupal contributed module project page provides a lot of context for why 404s are expensive in Drupal: … On an ‘average’ site with an ‘average’ module load, you can be looking at 60-100MB of memory being consumed on your server to deliver a 404. Consider a page with a bad .gif link and a missing .css file. That page will generate 2 404s along with the actual load of the page....