ts-plugin-type-coverage incredible slow

[darky]

When I active it
https://github.com/plantain-00/type-coverage#the-typescript-language-service-plugin-of-type-coverageadded-in-v212

My IDE became incredible slow.
Each change of code entails CPU usage 100% of tsserver process.
Also tsserver eat 1.5GB of memory instead 300Mb like before.
Why it happens? Maybe type-coverage do full project check, when trivial change of code in file happens?
IDE responsibility on each change of code is 5-10 seconds now. Sorry, it's not useful for development.

[crazylive]

Have the same problem.

Noticed the bundle between TS 4.0.2 and type-coverage 2.13.1 has become much slower, compared to TS 3.7.5 and type-coverage 2.4.2

Unfortunately had to temporarily remove type-coverage after add to project dependency "styled-components". There is not enough ignore for the lib and everything connected with it.

Probably this is another issue...

Please help, i like type-coverage

[plantain-00]

I will check this issue this weekend, you can disable it by commenting it in "plugins" or disable the plugin.
@crazylive I checked the check time on this project, 1.8s with cache for v1.4.2, 2.1s ~ 3s without cache for v2.13.1, it seems not a problem.


https://travis-ci.org/github/plantain-00/type-coverage/builds/662305606
https://travis-ci.org/github/plantain-00/type-coverage/builds/726738671

[crazylive]

you right, seems it affected from other dependencies, i check it later

[plantain-00]

I checked, but I cannot reproduce it in my MacBook air.

I tried to enable the plugin by set plugins in tsconfig.json compilerOptions, also by install the vscode plugin. The plugin works as expected, and my CPU and memory looks normal. The VScode responsibility on each change of code is less than 0.5 seconds, same as usual.

I checked the code, the plugin just check the current file, not whole project:
https://github.com/plantain-00/type-coverage/blob/master/packages/plugin/src/index.ts#L18
https://github.com/plantain-00/type-coverage/blob/master/packages/core/src/core.ts#L176