Perfmap

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

Perfmap - Resource Timing Heatmap

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!

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Extension stats

This extension was removed from Chrome Web Store on 2021-04-06

By: https://umaar.com

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

Other platforms

Not available on Android

Not available on Firefox

Not available on Edge

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Extension summary

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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