DebugBear: 2020 Chrome Extension Performance Report

anon · Jun 23, 2020

DebugBear: 2020 Chrome Extension Performance Report
15 Jun 2020
https://www.debugbear.com/blog/2020-chrome-extension-performance-report

I tested how the 1000 most popular Chrome extensions affect browser performance.

The main metrics I'll consider are CPU consumption, memory consumption, and whether the extension makes pages render more slowly.

Here's a list of all tested extensions and their results.
Click to expand...

Conclusion
Most websites take at least a second to load, so if an extension adds another 100ms this user might not even notice. However, doing this on every single page adds up.

Many users have several extensions installed, so a small performance impact can add up to large negative effect on user experience.

I ran these tests on an n2-standard-2 Google Cloud instance, the numbers in this report show the median of 7 runs.

About 20 extensions were excluded because I couldn't get them to run correctly in the test environment. A large percentage of extensions only modify the New Tab screen – I excluded those extensions from the test as well.
Click to expand...

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