Perfmap

Perfmap

Heatmap of resources loaded in the browser using the Resource Timing API

What is Perfmap?
Perfmap is a front-end performance heatmap of resources loaded in the browser using the Resource Timing API. It allows users to visualize the timing at which images finished loading and provides insights into user experience. With a legend and timeline indicator, it offers a comprehensive view of page load timings. Get the extension now!
Stats
This extension was removed from Chrome Web Store on 2021-04-06
Users: 5,557+
Rating: 4.69 (13)
Version: 1.2 (Last updated: 2014-10-25)
Risk impact: High risk impact
Risk likelihood: High risk likelihood
Manifest version: 2
Permissions:
  • tabs
  • http://*/*
  • https://*/*
Size: 148.48K
Price: Free
Stats date:

Other platforms

Not available on Firefox
Not available on Edge
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Summary

A front-end performance heatmap of resources loaded in the browser using the Resource Timing API.

The heatmap colours and the first ms value indicate at what point in the page load did the image finished loading. It's a good indicator of user experience. "It took 3450ms before the user saw this image." The second value in brackets is the time it took the browser to load that specific image.

The legend attached to the bottom of the page shows timings for the full page load and hovering over a coloured area on the heatmap will move the timeline indicator to show you when that image was fully loaded.

Code: https://github.com/zeman/perfmap

User reviews
+Me sorprendió la manera de mostrar las estadísticas. -Se podrían poner más claros los tiempo.
by Jo Be, 2017-10-18

Could you please that I am able to modify the text result. Like change the font size maybe? Thank you

Great tool. Really useful. Thanks a lot.
by Laur Rent Laur Rent, 2015-08-08
View all user reviews
Safety
Risk impact

Perfmap is risky to use as it requires a number of sensitive permissions that can potentially harm your browser and steal your data. Exercise caution when installing this extension. Review carefully before installing. We recommend that you only install Perfmap if you trust the publisher.

Risk likelihood

Perfmap may not be trust-worthy. Avoid installing if possible unless you really trust this publisher.

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