Accessing DOM is slow (in Canvas)

Issue #8147766 • Assigned to Sam F.


Niels B.
Jul 12, 2016
This issue is public.
Reported by 2 people

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Steps to reproduce

Github Issue:

On a project I was working on Edge was way slower than other browsers. It turns out the bottleneck was accessing the DOM for the canvas.

The project can be found here:

Once the size of the map gets bigger than the canvas (485x485) it changes to a different render algorithm which was ~15 times slower on Edge compared to Firefox.


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    Comments and activity

    • Microsoft Edge Team

      Changed Assigned To to “Travis L.”

      Changed Title from “Accessing DOM is slow” to “Accessing DOM is slow (in Canvas)”

      Changed Assigned To to “Christian F.”

      Changed Assigned To from “Christian F.” to “Li-Hsin H.”

    • canvas rendering very very very slow for images larger than about 500px. so slow that our app is useless on Edge so we will put up a notice not to use Edge due to performance issues. this is the only browser with the issue. even ie11 renders ok. the app is under development so no link to demo…sorry about that.

    • Microsoft Edge Team

      Changed Assigned To from “Li-Hsin H.” to “Sam F.”

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