high cpu load for huge data in subdirs around

[karnigen]

Issue Type: Performance Issue

Running vs code as "code ." in place with subdirectories with huge data ~52GB requires high cpu load, I'm not sure whether process will ever end. High usage has process "vscode bootstrap-fork --type=watcherService". All extension are disabled.
Using vs code as "code Readme.txt" in same place runs quickly and same is for any other places with small data around.

VS Code version: Code 1.55.2 (3c4e3df, 2021-04-13T09:37:02.931Z)
OS version: Linux x64 5.8.0-50-generic

System Info

Item	Value
CPUs	Intel(R) Core(TM) i7-8750H CPU @ 2.20GHz (12 x 3900)
GPU Status	2d_canvas: enabled gpu_compositing: enabled multiple_raster_threads: enabled_on oop_rasterization: disabled_off opengl: enabled_on protected_video_decode: unavailable_off rasterization: disabled_software skia_renderer: enabled_on video_decode: disabled_software vulkan: disabled_off webgl: enabled webgl2: enabled
Load (avg)	0, 0, 0
Memory (System)	15.51GB (7.97GB free)
Process Argv	. --no-sandbox --crash-reporter-id 0d9e7139-320f-41b1-95c0-2edb551f3c89
Screen Reader	no
VM	0%
DESKTOP_SESSION	mate
XDG_CURRENT_DESKTOP	MATE
XDG_SESSION_DESKTOP	mate
XDG_SESSION_TYPE	x11

Process Info

CPU %	Mem MB	   PID	Process
    0	   127	 14904	code main
    0	    32	 14906	   zygote
    0	    95	 14936	     gpu-process
    0	    32	 14907	   zygote
    0	    79	 15101	     window (Issue Reporter)
    0	    48	 14939	   utility
    0	   159	 14961	   window (Getting Started - progs - Visual Studio Code)
    0	    95	 15006	     extensionHost
    0	    64	 15032	     watcherService
    0	   111	 15000	   shared-process
    0	    48	 15040	     ptyHost
    0	     0	 15119	     /bin/sh -c /bin/ps -ax -o pid=,ppid=,pcpu=,pmem=,command=
    0	     0	 15120	       /bin/ps -ax -o pid=,ppid=,pcpu=,pmem=,command=

Workspace Info

|  Window (Getting Started - progs - Visual Studio Code)
|    Folder (progs): 246 files
|      File types: tcl(65) gif(60) mortran(12) md(10) fig(9) xbm(8) egsinp(7)
|                  f(5) mortlst(5) h(4)
|      Conf files: makefile(7);

Extensions: none

A/B Experiments

vsliv368:30146709
vsreu685:30147344
python383:30185418
pythonvspyt700cf:30270857
pythonvspyt602:30291499
vspor879:30202332
vspor708:30202333
vspor363:30204092
vstry914:30276682
vstes627cf:30244335
pythonvspyt639:30291489
pythontb:30283811
vspre833cf:30267465
pythonptprofiler:30281270
vsdfh931:30280409
vshan820:30276952
pythondataviewer:30285071
vscus158cf:30286554
vscgsv2:30294352

[bpasero]

/duplicate #3998