Long Delay When Breakpoint Hit After VS Code Update

[as185386]

Issue Type: Performance Issue

VS Code just updated to the latest version. Now, when debugging a React app, there is a much longer delay when a breakpoint is hit before I can view or do anything in VS Code than there was before the update. It is taking a minute or two before the UI becomes responsive which is very disruptive when debugging.

VS Code version: Code 1.56.0 (cfa2e21, 2021-05-04T22:09:06.405Z)
OS version: Windows_NT x64 10.0.18363

System Info

Item	Value
CPUs	Intel(R) Core(TM) i7-7820HQ CPU @ 2.90GHz (8 x 2904)
GPU Status	2d_canvas: enabled gpu_compositing: enabled multiple_raster_threads: enabled_on oop_rasterization: enabled opengl: enabled_on rasterization: enabled skia_renderer: enabled_on video_decode: enabled vulkan: disabled_off webgl: enabled webgl2: enabled
Load (avg)	undefined
Memory (System)	15.86GB (7.91GB free)
Process Argv	--crash-reporter-id 9dc68548-dd88-491e-8477-4e0dd201a134
Screen Reader	no
VM	33%

Process Info

CPU %	Mem MB	   PID	Process
    1	    84	 13096	code main
    0	    27	  7904	   utility
    1	    49	  9160	   window (Issue Reporter)
    0	    69	 14580	   shared-process
    0	    35	 12560	     "C:\Users\as185386\AppData\Local\Programs\Microsoft VS Code\Code.exe" "c:\Users\as185386\AppData\Local\Programs\Microsoft VS Code\resources\app\out\bootstrap-fork" ms-vscode.pwa-msedge "{\"common.vscodemachineid\":\"889aa20947a25e654c07ca305cd44d48de113be13fde6f497dcf2269fd319e9d\",\"common.vscodesessionid\":\"546bcf09-ffcf-4804-89a9-add33b3e3fd61620408336507\"}" AIF-d9b70cd4-b9f9-4d70-929b-a071c400b217
    0	    31	 22220	     ptyHost
    0	     6	 20488	       console-window-host (Windows internal process)
    0	    75	 20536	       C:\WINDOWS\System32\WindowsPowerShell\v1.0\powershell.exe
    0	    13	 23468	         C:\WINDOWS\system32\cmd.exe /c ""C:\Program Files\nodejs\npm.cmd" run start"
    0	    29	 14604	           "C:\Program Files\nodejs\\node.exe"  "C:\Program Files\nodejs\\node_modules\npm\bin\npm-cli.js" run start
    0	    13	 18192	             C:\WINDOWS\system32\cmd.exe /d /s /c react-scripts start
    0	    22	 14864	               electron_node react-scripts.js 
    0	   334	  5036	                 "C:\Program Files\nodejs\node.exe" C:\Development\NPS-Configuration-Manager\src\node_modules\react-scripts\scripts\start.js
    5	   343	 11916	                   "C:\Program Files\nodejs\node.exe" --max-old-space-size=2048 C:\Development\NPS-Configuration-Manager\src\node_modules\fork-ts-checker-webpack-plugin\lib\service.js
    1	   252	 21144	   gpu-process
    0	   251	 23456	   window (EditLane.tsx - src - Visual Studio Code)
    0	    32	 20556	     searchService
    0	   217	 23396	     extensionHost
    0	    39	 21320	       electron_node server.js 
    0	    92	 24640	       electron_node eslintServer.js 
    0	   120	 24900	       electron_node ms-vscode.js 
    0	    25	 16660	         window (undefined)
    0	     7	 17420	         crashpad-handler
    0	    19	 19372	         utility
    0	   153	 23656	         gpu-process
    1	   718	 24176	         window (undefined)
    0	    33	 26132	         utility
    0	   244	 25448	       electron_node tsserver.js 
    0	    44	  2348	         electron_node typingsInstaller.js typesMap.js 
    0	    30	 25512	       "C:\Users\as185386\AppData\Local\Programs\Microsoft VS Code\Code.exe" "c:\Users\as185386\AppData\Local\Programs\Microsoft VS Code\resources\app\extensions\json-language-features\server\dist\node\jsonServerMain" --node-ipc --clientProcessId=23396
    0	    70	 25888	       electron_node tsserver.js 
    0	    14	 26496	     watcherService 
    0	    12	  9344	       console-window-host (Windows internal process)
    0	    13	 24996	   crashpad-handler

Workspace Info

|  Window (EditLane.tsx - src - Visual Studio Code)
|    Folder (src): 245 files
|      File types: ts(63) tsx(62) png(17) json(12) jpg(9) map(5) js(4) txt(3)
|                  jpeg(3) ico(2)
|      Conf files: launch.json(1) tasks.json(1) package.json(1)
|                  tsconfig.json(1)
|      Launch Configs: pwa-msedge docker;

Extensions (15)

Extension	Author (truncated)	Version
bracket-pair-colorizer-2	Coe	0.2.0
vscode-svgviewer	css	2.0.0
vscode-eslint	dba	2.1.20
EditorConfig	Edi	0.16.4
prettier-vscode	esb	6.3.2
color-the-tag-name	jzm	0.19.8
git-graph	mhu	1.30.0
import-sorter	mik	3.3.1
vscode-docker	ms-	1.12.1
csharp	ms-	1.23.11
remote-containers	ms-	0.177.0
env-cmd-file-syntax	Nix	0.2.2
material-icon-theme	PKi	4.6.0
vscode-javascript-booster	sbu	14.0.1
sass-indented	syl	1.8.16

(1 theme extensions excluded)

A/B Experiments

vsliv368cf:30146710
vsreu685:30147344
python383:30185418
pythonvspyt602cf:30294773
vspor879:30202332
vspor708:30202333
vspor363:30204092
vswsl492:30256859
vstes516:30244333
pythonvsnew554cf:30291488
pythontb:30283811
vspre833:30267464
pythonptprofiler:30281270
vshan820:30294714
pythondataviewer:30285071
vscus158cf:30286554

[as185386]

Just to provide more info, I reverted back to version 1.55.2 and, when I hit a breakpoint, the UI is almost instantly responsive. Thanks!

[isidorn]

I can not reproduce. Can you reproduce using Visual Studio Code Insiders https://code.visualstudio.com/insiders/

[avenmore]

I'd guess this is a duplicate of #123257, a possible regression of issue mentioned in #116865, #116615, #117162, (and more) which were closed as duplicates of #114459. It is back with this build for me too.

[isidorn]

@avenmore thanks, let close as duplicate and we will probably soon reopen the root cause issue

[isidorn]

@as185386 can you reproduce if you start vscode with
code --disable-features=CalculateNativeWinOcclusion <path to workspace/folder>

[isidorn]

Let's close as duplicate of #123257
Please follow that issue for more details

@as185386 also if you can try running VS Code with the flag would be great. Thanks