Despite my best intentions to build sites with minimal use of plugins (in any CMS) I have resorted to a dozen or so on one Craft site with about 25 sections and 1000 entries, to help with both CP and front-end things. Since the v2.5 upgrade (I think) I noticed that the Settings page had become impossibly slow to load (about 30 seconds, and this often within the Settings area too) which stretches my tolerance when I am working. I disabled all loaded plugins and suddenly everything was good again. I then added plugins one by one and tested the Settings page loading time. It eventually came down to two (Cache Warmer and Sitemap) that slowed loading time, and the effect seemed to be cumulative (i.e. one plugin was only half as slow). Is it a reasonable assumption that some plugins may affect Settings page loading time, and has anyone else noticed this? What can I do about it?
I guess someone will mention the L-word (logs) but I always have a hard time understanding which log files to look at and what to look for.