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On a test at http://tools.pingdom.com/ I discovered that the loading waterfall of my website has a huge gap (see 1st screen).

I tried removing analytics. The gap still remains, while analytics is removed from waterfall (see 2nd screen). I have a lot of css. So I cleared all stylesheet but the gap still remained.

Note: all remaining .js files are in the footer.

How can there still be such a big loading gap? What are the possible causes?

pingdom screenshot

chrome screenshot without analytics

user3797772
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  • as commented on Niv's reply: Well, I did a further testing and put the same site onto another hosting with similar specs. in that environment there is no gap but a longer waiting for the first response. in total i get very similar total loading times. does that mean that different servers flush differently? – user3797772 May 19 '15 at 18:33

2 Answers2

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I have done some research and got to know that, the gaps are delays/intervals timings loading the files that are loaded by scripts and CSS files. As many .js library images or other reference in it not loaded till the .js file it self not loaded.

I think the below links may elaborate your idea : Gaps in FireBug waterfall chart. Also working of firebug is decribed here http://www.softwareishard.com/blog/firebug/firebug-net-panel-timings/

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Nivs
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  • Well, I did a further testing and put the same site onto another hosting with similar specs. in that environment there is no gap but a longer waiting for the first response. in total i get very similar total loading times. does that mean that different servers flush differently? – user3797772 May 19 '15 at 18:16
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Against the theory posted by Nivs, in my case at least, it were scripts running on the server. This was indicated by a faster (no gap) response on another host with the same website.

My solution for this Problem was partial caching of my Website.

user3797772
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