Performance/Addons/BestPractices: Difference between revisions

Performance/Addons/BestPractices (view source)

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 ==apng/agif inappropriate in a lot of cases==
-Animations require a lot of time to set up (basically decoding many images, not just one; add timers and such to that). Then the image caches often get invalidated, causing your animated images to be reloaded lots of times.
+Animations require a lot of time to set up, as a lot of images are decoded (the frames).
-nsITree/<tree> seems to be extra special in this regard, as it seem to
+Animated images may have their cached representations evicted quite often, causing the frames of your animated images to be reloaded lots of times, not just once.
-not cache animations at all under some circumstances.
+nsITree/<tree> seems to be extra special in this regard, as it doesn't seem to
+cache animations at all under certain circumstances.
 ==base64/md5/sha1 implementations==