Slow Typescript Intellisense in big project

[samchouse]

Issue Type: Performance Issue

I have a big project/workspace (8 folders each with a different program) and when I use intellisense it takes about 3 seconds to load. I have added node_modules and my builds to vscode ignore.

VS Code version: Code - Insiders 1.55.0-insider (e4b1e9a, 2021-03-19T05:14:29.874Z)
OS version: Linux x64 5.8.0-45-generic

System Info

Item	Value
CPUs	Intel(R) Core(TM) i5-10300H CPU @ 2.50GHz (8 x 3500)
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)	1, 1, 1
Memory (System)	15.40GB (4.37GB free)
Process Argv	--no-sandbox --unity-launch --crash-reporter-id e77e7c8c-180a-4efe-8d77-5ad903df7f0d
Screen Reader	no
VM	0%
DESKTOP_SESSION	plasma
XDG_CURRENT_DESKTOP	KDE
XDG_SESSION_DESKTOP	KDE
XDG_SESSION_TYPE	x11

Process Info

CPU %	Mem MB	   PID	Process
    1	   158	204818	code-insiders main
    0	    32	204821	   zygote
    0	   173	204845	     gpu-process
    0	    32	204822	   zygote
    1	    79	208955	     window (Issue Reporter)
    0	    47	204852	   utility
    0	   300	204872	   window (index.tsx - quicky-gg (Workspace) - Visual Studio Code - Insiders)
    0	   300	205273	     extensionHost
    0	   110	205363	       electron_node tsserver.js 
    0	   347	205364	       electron_node tsserver.js 
    0	    79	205415	         electron_node typingsInstaller.js typesMap.js 
    0	    63	205627	       /usr/share/code-insiders/code-insiders /usr/share/code-insiders/resources/app/extensions/json-language-features/server/dist/node/jsonServerMain --node-ipc --clientProcessId=205273
    0	   126	205860	       electron_node eslintServer.js 
    0	    63	205301	     watcherService
    0	    63	205395	     searchService
    2	   126	205287	   shared-process
    0	    63	205318	     ptyHost
    0	     0	205978	       /usr/bin/zsh
    0	     0	208973	     /bin/sh -c /usr/bin/ps -ax -o pid=,ppid=,pcpu=,pmem=,command=
    0	     0	208974	       /usr/bin/ps -ax -o pid=,ppid=,pcpu=,pmem=,command=

Workspace Info

|  Window (index.tsx - quicky-gg (Workspace) - Visual Studio Code - Insiders)
|    Folder (docker): 4 files
|      File types: yml(1) json(1) conf(1)
|      Conf files: package.json(1)
|    Folder (rpc): 2 files
|      File types: json(1)
|      Conf files: package.json(1)
|    Folder (api-wrapper): 17 files
|      File types: json(4) ts(4) yml(1) gitignore(1) js(1) lock(1)
|      Conf files: github-actions(1) package.json(1) tsconfig.json(1)
|    Folder (cli): 35 files
|      File types: js(11) json(5) ts(3) yml(1) gitignore(1) tsbuildinfo(1)
|                  log(1) lock(1)
|      Conf files: package.json(2) github-actions(1) tsconfig.json(1)
|    Folder (discord-bot): 119 files
|      File types: ts(38) js(36) json(4) dockerignore(1) development(1)
|                  example(1) production(1) eslintignore(1) yml(1)
|                  gitignore(1)
|      Conf files: github-actions(1) package.json(1) tsconfig.json(1)
|    Folder (backend): 279 files
|      File types: js(119) ts(88) md(7) json(7) html(4) csv(3) txt(3) css(2)
|                  png(2) dockerignore(1)
|      Conf files: github-actions(1) launch.json(1) tasks.json(1)
|                  package.json(1) tsconfig.json(1)
|      Launch Configs: docker
|    Folder (cdn): 1418 files
|      File types: js(22) json(10) ts(3) tsx(3) css(2) development(1)
|                  example(1) production(1) yml(1) gitignore(1)
|      Conf files: github-actions(1) package.json(1) tsconfig.json(1)
|    Folder (frontend): 6600 files
|      File types: ts(61) js(39) tsx(36) json(29) svg(4) DS_Store(4) webp(3)
|                  dockerignore(1) development(1) example(1)
|      Conf files: github-actions(1) package.json(1) tsconfig.json(1);

Extensions (34)

Extension	Author (truncated)	Version
vscode-css-formatter	aes	1.0.1
cypress-snippets	and	1.2.0
jest-snippets	and	1.8.0
better-toml	bun	0.3.2
vscode-eslint	dba	2.1.19
es7-react-js-snippets	dsz	3.1.1
vsc-material-theme	Equ	33.2.0
vsc-material-theme-icons	equ	1.2.2
prettier-vscode	esb	6.3.1
vscode-firefox-debug	fir	2.9.2
vscode-jest-runner	fir	0.4.31
shell-format	fox	7.0.1
helium-icon-theme	hel	1.0.0
discord-vscode	icr	5.4.0
fluent-icons	mig	0.0.7
dotenv	mik	1.0.1
vscode-docker	ms-	1.11.0
python	ms-	2021.3.658691958
jupyter	ms-	2021.4.641214696
remote-containers	ms-	0.164.1
cpptools	ms-	1.2.2
vsliveshare	ms-	1.0.3968
vscode-jest	Ort	3.2.0
material-icon-theme	PKi	4.5.0
vscode-yaml	red	0.16.0
logos-vscode	Ren	0.5.1
rust	rus	0.7.8
vs-code-prettier-eslint	rve	0.4.1
html-preview-vscode	tht	0.2.5
shellcheck	tim	0.14.0
vscode-counter	uct	2.2.2
clang-format	xav	1.9.0
commandlist	yam	1.0.3
material-theme	zhu	3.9.15

(7 theme extensions excluded)

A/B Experiments

vsliv695:30137379
vsins829:30139715
vsliv368cf:30146710
vsreu685:30147344
python383:30185418
pythonvspyt602:30263608
vspor879:30202332
vspor708:30202333
vspor363:30204092
vstry914:30244316
pythonvsdeb440:30224570
pythonvsded773:30223139
pythonvspyt875:30259475
pythonvsnew554:30265444
pythontb:30258533
pythonvspyt943:30277000
openwslfolder:30278404
vscoresta800cf:30265948
vspre833:30267464
vsfjg287:30275553
vshan820:30276952

[samchouse]

Happens on stable too, both with extensions disabled.

[mjbvz]

Have you tried following the documentation for large projects: https://code.visualstudio.com/docs/typescript/typescript-compiling#_working-with-large-projects

[samchouse]

Yes I have tried.

Sorry for making the issue here, I'm not sure why VSCode brought me here.

[RyanCavanaugh]

We'd need something more actionable (sample repo, etc) to be able to investigate

[samchouse]

I'm working on a private project, how would I share?

[DanielRosenwasser]

We generally have users read a bit through this page

https://github.com/microsoft/TypeScript/wiki/Performance

There is a section on diagnosing/investigating issues:

https://github.com/microsoft/TypeScript/wiki/Performance#investigating-issues

Along with a section on what we generally look for in issues filed around performance:

https://github.com/microsoft/TypeScript/wiki/Performance#filing-an-issue

[samchouse]

Files:                         575
Lines:                      581103
Nodes:                     1786979
Identifiers:                649714
Symbols:                    428433
Types:                       32508
Instantiations:             134927
Memory used:               573181K
Assignability cache size:    10497
Identity cache size:            75
Subtype cache size:            883
Strict subtype cache size:      69
I/O Read time:               0.22s
Parse time:                  3.30s
ResolveModule time:          0.40s
ResolveTypeReference time:   0.06s
Program time:                4.26s
Bind time:                   1.45s
Check time:                  1.81s
transformTime time:          0.34s
commentTime time:            0.27s
printTime time:              1.94s
Emit time:                   1.95s
Source Map time:             0.15s
I/O Write time:              0.03s
Total time:                  9.47s

I don't have the command TypeScript: Open TS Server log. I also do not have anywhere near 500 files.

[samchouse]

Mostly fixed in newer versions