1.33 performance issues with TypeScript and JavaScript

[leeandher]

• VSCode Version: 1.33
• OS Version: Windows 10 (v1809)

Steps to Reproduce:

1. Launch VSCode

Does this issue occur when all extensions are disabled?: Yes

After updating to the latest version of VSCode, it became pretty much unusable. I mainly work on web development, so that's all that I could speak on but things became measurably slower.

At idle it was consuming 45+% of CPU usage and ~1 GB RAM

Errors stopped dismissing/updating:

Suggestions/Intellisense stopped showing up (or took 3s+ to show up if at all):

Emmet/Tag autocomplete stopped functioning:

When I downgraded, it seemed to all go away, I tried reinstalling 3 times, everytime I selected the upgrade the problems came back. I also restarted VSCode and my computer multiple times. For now, I'm just staying at 1.32.3.

[mjbvz]

Please follow these instructions to collect performance information. Share the output of code --status

Could be microsoft/TypeScript#30663

[leeandher]

code --status output:

Version:          Code 1.33.0 (0dd516dd412d42323fc3464531b1c715d51c4c1a, 2019-04-04T15:14:28.026Z)
OS Version:       Windows_NT x64 10.0.17763
CPUs:             Intel(R) Core(TM) i7-8750H CPU @ 2.20GHz (12 x 2208)
Memory (System):  15.87GB (8.62GB free)
VM:               0%
Screen Reader:    no
Process Argv:
GPU Status:       2d_canvas:                    enabled
                  checker_imaging:              disabled_off
                  flash_3d:                     enabled
                  flash_stage3d:                enabled
                  flash_stage3d_baseline:       enabled
                  gpu_compositing:              enabled
                  multiple_raster_threads:      enabled_on
                  native_gpu_memory_buffers:    disabled_software
                  rasterization:                enabled
                  surface_synchronization:      enabled_on
                  video_decode:                 enabled
                  webgl:                        enabled
                  webgl2:                       enabled

CPU %   Mem MB     PID  Process
    1       85   14656  code main
    0      195    3560     window (Release Notes: 1.33.0 - leander.xyz - Visual Studio Code)
    0       34    5616       searchService
    0       14    7700       electron-crash-reporter
    0      110   14692       extensionHost
    0       53    5696         electron_node server.js
    0       32   13164         "C:\Users\leand\AppData\Local\Programs\Microsoft VS Code\Code.exe" "c:\Users\leand\AppData\Local\Programs\Microsoft VS Code\resources\app\extensions\json-language-features\server\dist\jsonServerMain" --node-ipc --clientProcessId=14692
    0       73   13836         electron_node eslintServer.js
    8      433   16508         electron_node tsserver.js
    0       45   11968           electron_node typingsInstaller.js typesMap.js
    0       11   15216       watcherService
    0       11   10456         console-window-host (Windows internal process)
    0       65   15688     shared-process
    0       87   17900     gpu-process
    0       88   18324     window (undefined)

Workspace Stats:
|  Window (Release Notes: 1.33.0 - leander.xyz - Visual Studio Code)
|    Folder (leander.xyz): 480 files
|      File types: js(173) json(140) map(47) png(37) html(22) svg(12) md(11)
|                  gitkeep(9) yml(5) webmanifest(4)
|      Conf files: package.json(3) settings.json(1)

[leeandher]

I might be incorrectly identifying this as a performance issue, but it's definitely disabling the above features in the editor some how.

The related issue seemed to be a TypeScript, which I'm not using. I am using styled-components at ^4.1.3 though.

[mjbvz]

Thanks. Yes this is in all likelihood a duplicate of microsoft/TypeScript#30663. Typescript also powers our JavaScript intellisense so this is the correct issue even though you are not writing typescript

Main fix
We have pushed a fix upstream to the @types file that triggered this issue.

TypeScript users should make sure they are pulling in the latest version of @types/styled-components (4.1.13) and that 4.1.0-4.1.12 are not in your project

If you are using JavaScript, you may to clear your automatic typings cache to clear the file that caused this from their cache. To do this, delete the typings typing cache file listed below and restart vscode:

• Mac: ~/Library/Caches/TypeScript/3.4
• Windows: %LOCALAPPDATA%\Microsoft\TypeScript\3.4
• Linux: ~/.cache/typescript/3.4

Other possible workarounds:

• Downgrade your workspace to use typescript@3.3 by following these instructions

• Try to install @types/styled-components@4.1.5 into your workspace. See: [@types/styled-components] Performance issues on compiler DefinitelyTyped/DefinitelyTyped#34391 for more details