JS/TS language features take > 4 min to load when vscode-gengetset is enabled

[jimrandell]

Issue Type: Bug

JS/TS language features load time

GenGetSet Status	Load Time
Enabled	4-5 min
Disabled	40-45 seconds

Extension version: 0.5.0 VS Code version: Code 1.52.1 (ea3859d4ba2f3e577a159bc91e3074c5d85c0523, 2020-12-16T16:34:46.910Z) OS version: Windows_NT x64 10.0.19041

System Info

Item	Value
CPUs	Intel(R) Core(TM) i7-4790 CPU @ 3.60GHz (8 x 3592)
GPU Status	2d_canvas: enabled flash_3d: enabled flash_stage3d: enabled flash_stage3d_baseline: enabled gpu_compositing: enabled multiple_raster_threads: enabled_on oop_rasterization: disabled_off opengl: enabled_on protected_video_decode: unavailable_off rasterization: enabled skia_renderer: disabled_off_ok video_decode: enabled vulkan: disabled_off webgl: enabled webgl2: enabled
Load (avg)	undefined
Memory (System)	15.95GB (4.24GB free)
Process Argv	--crash-reporter-id aa896b77-2c4e-4759-aa6c-deb823a6f94c
Screen Reader	no
VM	0%

A/B Experiments

vsliv368cf:30146710
vsreu685:30147344
openlogontheside:30221877
python763:30178808
python383cf:30185419
pythonvspyt700:30237718
vspor879:30202332
vspor708:30202333
vspor363:30204092
python504:30227505
vswsl492:30211401
wsl2promptcf:30224613
pythonvsdeb440cf:30237828
unusedprompt:30224610
folderexplorer:30224614
openfilemenucf:30224648
pythonvsded773cf:30236630
vsjup459cf:30237188