GTmetrix Performance Blog

News, updates and guides on GTmetrix and general web performance

History Graph Improvements and Other Updates

History graphs now only load the latest 500 reports for faster graph generation.

We’ve made improvements to our History graph to help with reports containing large amounts of historical data. To reduce loading times, only the last 500 reports are loaded upon clicking the History Tab.

Clicking the History tab will load the latest 500 reports only.


If you require more data for trend analysis, you can load the rest of your historical report data by clicking on Load more history – located on the right sidebar.

Click “Load more history” to load the rest of your report data.


Note: This may take a while as you may have thousands of reports to load.

Lastly, we’ve fixed the History pan feature for more accurate behaviour (it now retains the period you’ve selected).



Other Updates

  • Chrome HAR Fixes
    • Fix body size of some text type resources
    • Add more precision to timings (0.1ms)
    • Add new custom timing _blocked_queueing: time spent in Chrome’s request queue (blocked is this time, plus any time before the request actually starts)
    • Fix missing blocked time in some situations
    • Fix HTTP/1 header order
    • Add estimated HTTP/2 header size
    • Bumped creator version from 0.1 to 0.2
    • Tweak HAR viewer round precision


  • async Bug/Cloudflare Fix
    Fixed a bug where Rocketloader wasn’t detected as asynchronous.
  • Added Netlify as a CDN


Let us know if you run across any bugs or issues and feel free to tell us your thoughts on Twitter (@gtmetrix) or contact us.


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