# Performance analysis

**URL:** <https://discourse.mozilla.org/t/performance-analysis/23293>\
**Category:** Developer Tools\
**Created:** [December 11, 2017, 9:49am UTC](https://discourse.mozilla.org/t/performance-analysis/23293 "2017-12-11T09:49:44Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![belram](https://avatars.discourse-cdn.com/v4/letter/b/d26b3c/32.png) [@belram](https://discourse.mozilla.org/u/belram)\
**Post date:** [December 11, 2017, 9:49am UTC](https://discourse.mozilla.org/t/performance-analysis/23293/1 "2017-12-11T09:49:44Z")

</div>

Hello community,

I am here to report something on the performance analysis in Firefox Developer Ed. It seems as if the pie chart for mobile gives me cached results once I already tried the tool. I have to close my browser again to not have the cached files. I noticed this because it gives me once 5 seconds loading for mobile and when I rerun the test 3 seconds. Page Speed Insights always gives me 5 seconds for mobile. Can you fix this?