Describe the bug
Hi @DanTup 👋
I am facing really slow plugin behaviour (Dart and Flutter). Generally, each and every action seems to be very slow.
I don't remember from when all this started, but maybe since last 4-5 releases, I am facing this issue.

Things which are slow for me:

• Going to symbol
  https://drive.google.com/drive/folders/1XxIf1ZlBiPeCqX93zAWEbIQ7Qnbxk-Xt?usp=sharing

• Symbol renaming. Takes around 15-30 seconds minimum.

To Reproduce
Steps to reproduce the behavior:

1. Enable LSP
2. Do above things

Expected behavior
In non-LSP, it is instant. But in LSP mode, it is very much problematic.

Versions (please complete the following information):

• VS Code version: 1.50.0
• Dart extension version: 3.15.0
• Dart/Flutter SDK version: Flutter 1.22.0 • channel stable