CPU usage high and status bar flickers when works with VSCode Vim

[houkanshan]

Hi, thank you for your extremely useful extension. This problem happened when I just upgrade several things including VSCode@1.18.0, VSCodeVim@0.10.4

ENV:
macOS Sierra 10.12.6
VSCode@1.18.0
VSCodeVim@0.10.4
Code Spell Checker@1.4.12

In the GIF, the status bar is flickering between these 2 states

Also, the count of spell errors in the red circle will occasionally change from 25 to 39.

It will happen when I disabled all the extensions except Code Spell Checker & VSCodeVim, and the VSCodeVim has enabled statusBarColorControl like this:

    "vim.statusBarColorControl": true,
    "vim.statusBarColors": {
      "normal": "#005f5f",
      "insert": "#5f0000",
      "visual": "#5f00af",
      "visualline": "#005f87",
      "visualblock": "#86592d",
      "replace": "#000000"
    },

This problem can be solved temporarily by re-save the settings.json. Or just disabled the vim.statusBarColorControl feature.

Since it could be a bug of VSCode or VSCodeVim, and the status bar color is unnecessary to me, I just put this issue here in case you or others will find it useful.

[Jason3S]

Wow, thank you for such a great and explicit example!

I'll see if I can figure out how the two extensions are conflicting.

Can you try:

"vim.statusBarColorControl": true,
"cSpell.showStatus": false,

and check to see if the High CPU still happens?

[houkanshan]

Hi, thanks for replying.

After setting "cSpell.showStatus": false, the clock icon disappeared. But the count of spell errors is still flickering, and CPU is still high.

And I figure out what the flickering numbers are – in the GIF above, 5 is the warning count of the current file, 19 is the count of all the open files (= 14 + 5).

This will only happen when I'm editing normal files (typing, saving, opening, closing...). But once I open the setting.json, it turns stable:

But, after I close the setting.json, it becomes crazy again. :(

[Jason3S]

Wow, it is acting like something is changing settings.json in the background.

Whenever settings.json is changed, the spell checker has to reload all the settings and start the spell checking process from scratch. The clock is displayed while that is happening.

[houkanshan]

You are right. With vim.statusBarColorControl enabled, every time I change the Vim editing mode, the update time of setting.json will change. I think VSCode Vim is changing it.

Also, it seems Spell Checker is not the only extension that has such conflict with Vim, I found this issue: VSCodeVim/Vim#2124

It should be a problem of VSCode Vim or VSCode@1.18.0, I'm closing this issue, thank you for your help!

[Jason3S]

Thank you for reporting this.

I am guessing that the Vim extension is changing the settings.json file (possibly through the VS Code configuration api workspace.getConfiguration().update()) to change the status-bar color.

If VS Code does not correctly filter out the changes, it will cause the spell checker to re-load all configuration and re-check ALL open files. I think this is fixed in VS Code 1.19: microsoft/vscode#36475

[houkanshan]

Great, waiting for the stable build of 1.19

You are really helpful. 🥇

[github-actions]

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