php - What's different in App Engine SDK vs App Engine Production -

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i using appengine sdk developing php based project. project using pagespeed optimisations [1]. when compare "page speed" results using chrome developer toolbar [2] , find results different.

results in development sdk pagespeed results using sdk

results in production pagespeed results in production

so question why there significant difference in page optimisation? shouldn't sdk behave identical (or at-least close) production environment? other differences should need aware of during development. hard test page optimisations if development , production behave differently.

[1] https://developers.google.com/speed/pagespeed/

[2] https://chrome.google.com/webstore/detail/gplegfbjlmmehdoakndmohflojccocli

the 2 environments have same apis, 1 running on computer , other running on hundreds of servers , serving millions of users.

you able profile app in development though.

profiling can understand why "page speeds" slow in production, , show need improve code.


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