This is my site **7 months graph** from Google Webmaster Tools site performance util.

![enter image description here][1]

As you can see the graph goes up and down, with **big differences: less than 1 second up to 5 sec**.

Since I never changed anything (not an image, nor a script, nothing of nothing) during all those months do you think this could be caused by poor hosting, basically an overloaded server?

**Are you experiencing the same up/down graph for some/all of your sites on Google Webmaster Tools?**

BTW : ths site was also optimized with YSLOW, but optimized or not, shouldn't the graph be still more stright?


  [1]: https://i.sstatic.net/WVTIu.png