Slow response vscode, scroll freeze, slow file navigation

[induratized]

Issue Type: Bug

Install the extension and open a JS large file ~1000LOC.
Now scroll around, Cmd+Click a function to navigate to its declaration, open another such files and navigate around.
Everything seems to run quite slow and this is irritating UX.

Extension version: 3.15.2
VS Code version: Code 1.69.2 (3b889b090b5ad5793f524b5d1d39fda662b96a2a, 2022-07-18T16:12:57.074Z)
OS version: Darwin x64 21.2.0
Restricted Mode: No

System Info

Item	Value
CPUs	Intel(R) Core(TM) i5-8210Y CPU @ 1.60GHz (4 x 1600)
GPU Status	2d_canvas: enabled canvas_oop_rasterization: disabled_off direct_rendering_display_compositor: disabled_off_ok gpu_compositing: enabled metal: disabled_off multiple_raster_threads: enabled_on opengl: enabled_on rasterization: enabled raw_draw: disabled_off_ok skia_renderer: enabled_on video_decode: enabled video_encode: enabled webgl: enabled webgl2: enabled
Load (avg)	19, 19, 16
Memory (System)	8.00GB (0.69GB free)
Process Argv	--crash-reporter-id 1b654aa6-c989-4e2c-b14d-a372c2ec3eb5
Screen Reader	no
VM	0%

[Binaryify]

had you test other themes

[induratized]

Other themes are working fine. I used vscode bisect feature to zero down on extensions slowing down navigation. and this beautiful theme was in the list too.

My current active list of themes working fine

[Binaryify]

have no idea now, maybe the reason is the big size theme.json, it have 2000+ lines, so many rules might cause performance issue

[renwarkurd]

Slow performance with Emmet..
I have to wait a bit to create from the keyword td