GitHub Copilot VSCode extension high memory usage

[kon72]

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Hi,
I noticed GitHub Copilot extension consumes too much memory, 300-400 MB on startup of blank project.

Tried some profiling heap snapshot allocated in VSCode Extension Host process, and found that one of the dependencies of Copilot extension, source-map-support, is storing source code and its source maps in memory, summed up to around 100 MB.
The stored source code/maps includes those from Copilot extension itself, but not limited to that, also includes source code from other extensions like github.copilot-chat and eamodio.gitlens as shown in the image below.
This is because source-map-support hooks into Error.prepareStackTrace calls, which is shared across all extensions, and every time an error is thrown, it tries to resolve the source code and source maps and those are cached until the extension host is terminated.

I'd like to suggest to remove source-map-support from Copilot extension, or at least limit the effect of source-map-support to only the Copilot extension itself if it's possible.

source map is taking 53 MB:

source code is taking 30 MB:

Environment

• VSCode: 1.96.2
• GitHub Copilot extension: 1.256.1304
• GitHub Copilot Chat extension: 0.23.2

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[guisaliba]

Still relevant.