VS Code freezes debugging program with many threads #44248
Description
Issue Type
Performance Issue
Description
When using VS Code to debug a java program with many threads (~500) the UI becomes generally
unresponsive and sometimes freezes for about 10-20 seconds when hitting/continuing from a breakpoint.
The problem seems to be that VS Code tries to refresh the "Call Stack" very often
(and each refresh takes 100-200ms with that many threads)
VS Code Info
VS Code version: Code 1.20.1 (f88bbf9, 2018-02-13T15:23:28.607Z)
OS version: Darwin x64 17.4.0
System Info
| Item | Value |
|---|---|
| CPUs | Intel(R) Core(TM) i7-4980HQ CPU @ 2.80GHz (8 x 2800) |
| Load (avg) | 3, 4, 4 |
| Memory (System) | 16.00GB (6.91GB free) |
| Process Argv | /Applications/Visual Studio Code.app/Contents/MacOS/Electron . |
| Screen Reader | no |
| VM | 0% |
Workspace Info
| Window (HeaderController.java — core)
| Folder (core): more than 20000 files
| File types: java(12565) xml(1664) js(1072) json(925) class(430)
| txt(342) DS_Store(318) png(301) apex(242)
| html(234)
| Conf files: launch.json(1) settings.json(1) tasks.json(1)
| Launch Configs: java;
Extensions (10)
| Extension | Author (truncated) | Version |
|---|---|---|
| vscode-eslint | dba | 1.4.6 |
| tslint | eg2 | 1.0.28 |
| prettier-vscode | esb | 1.1.3 |
| python | ms- | 2018.1.0 |
| debugger-for-chrome | msj | 4.1.0 |
| java | red | 0.19.0 |
| lwc-vscode | sal | 0.11.2 |
| perforce | sle | 3.1.0 |
| rewrap | stk | 1.7.1 |
| vscode-java-debug | vsc | 0.6.0 |
(1 theme extensions excluded)
VS Code example stack trace when freezing:
