Note, I filed this against beta as I feel that this issue has impact for many developers and therefore deserves urgency. Furthermore, the impact outside code is zero.

Link to issue number:

Fixes #11533
Replaces #11653

Summary of the issue:

Visual Studio Code can be very sluggish. The reason is that the root of the Electron application has a tree interceptor that only contains an application, and therefore is basically doing nothing. However, when NVDA receives an event inside Visual Studio Code, it tries to find the tree interceptor assigned to the event's object. It also queries the unused tree interceptor, which is very costly.

Description of how this pull request fixes the issue:

Reintroduced appmodules as suggested by #11653 (comment) .

Testing performed:

Tested that performance increased significantly in both code and code insiders.

Known issues with pull request:

1. When you enable browse mode in the VS Code application using NVDA+space and then disable it, performance degrades a little. This is solved by alt+tab out and back in.
2. Not general fix, as such Performance issues caused by virtual buffers when many events are fired #11652 remains. This is a VS Code specific workaround. Ideally, the mentioned issue should be investigated further, but this issue has too much impact for end users to be left alone for a better fix.

Change log entry:

• Bug fixes
  • Major performance improvements in Visual Studio Code. (NVDA Laggs a lot in Visual Studio Code editor while typing and reading the code #11533)