jmarantz commented on issue #2053:
URL: 
https://github.com/apache/incubator-pagespeed-mod/issues/2053#issuecomment-753031507


   RE not seeing comments in HTML: Cloudflare's HTML minification probably 
strips those out.
   
   RE Cloudflare/mod_pagespeed compatibility: I am not aware of any specific 
issues, but mod_pagespeed and Cloudflare both do many of the same things. It's 
probably confusing if you have similar features enabled for both.
   
   Another thing I think might be confusing things is if Cloudflare is caching 
your HTML. That can make mod_pagespeed's HTML modification harder to reason 
about by delaying its visibility. Also you should be aware that the first time 
mod_pagespeed sees a page, it optimizes it in the background, storing the 
results in its server-side cache, and serves unoptimized or partially optimized 
HTML until the background optimizations complete. This can further confuse the 
apparent behavior if you have a caching CDN saving you HTML.
   
   RE "deadline exceeded": that is the background optimization at work for you, 
and is perfectly normal. Refresh the page and you should see optimized results.
   


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