WebPagetest Forums

Hello,

I have made some consecutive test on my site and I receive very different and confusing results.

1.http://www.webpagetest.org/result/100820_3A87/
2.http://www.webpagetest.org/result/100820_3A8A/
3.http://www.webpagetest.org/result/100820_3A8D/
4.http://www.webpagetest.org/result/100820_3A8J/
5.http://www.webpagetest.org/result/100820_3A8N/

Beside the very different Start Render time are other very strange things.
1.Why somethimes the Reapeat View is slower than the Firs View (see test 1 and 3)
2.Why for test 4 the reqests are paralellized 2 by 2 and for others they aren't?

It is because the hosting server or because my site code ???

You have quite a bit of variability in your first byte times (back-end code/server performance). From under a second to over 6 seconds. It looks like whatever code serves you css and js is having similar variability.

Without knowing how your site is put together I'd hazard a guess that most of it is caused by hosting but that your code could possibly be making things worse depending on what it is doing.

For your question #2, the requests in all of the tests are parallelized 2 by 2 (may be easier to see if you go down to the connection view waterfall). That is because IE 7 opens up 2 connections per domain and browsers can only have one request at a time open on a given connection. ou can make it more parallel by sharding the static objects across domains but your real bang for your buck will come with getting your back-end performance under control.

btw, if you open the advanced settings you can run up to 10 tests without having to submit them separately.