: Why do website speed testers show different page sizes each time I run the test? I'm using tools.pingdom.com for a website page speed tester which returns 4 metrics (Perf score, Requests, Load
I'm using tools.pingdom.com for a website page speed tester which returns 4 metrics (Perf score, Requests, Load time and Page Size).
I understand that servers may be under varying loads and therefore the score and load times may change, but I don't understand why my page size (which my site has remained unaltered between tests) should change in size.
Am I missing something here?
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I would say because they request your page in a different manner. If one tester accepts gzipping, that'll result in a smaller request. Maybe one displays gzipped size, and the other the decompressed result.
Might very well be they send different request headers and because of that, get other response headers back.
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