Performance regretion in 1.7.x

[jlarmstrongiv]

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Describe the bug
I have a 70,000 word document that was slow, but worked. In the latest 1.7.x, Typora is no longer usable with the document. The latest version at time of writing is 1.7.6. Downgrading to 1.6.7 works.

To Reproduce
Try to edit the document and click to move the cursor a lot

Expected behavior
Slow, but usable. Not lagging for multiple seconds.

Screenshots / Screencasts
If applicable, add screenshots / screencasts to help explain your problem.

Sample Markdown File
Email sent

Desktop (please complete the following information):
MacOS Sonoma 14.0

Typora Version
1.7.x

Additional context
I purchased multiple licenses because I like typora!

[hbsmith]

I'm having the same issue. It is especially laggy when typing bullet points.

[abnerlee]

Does 1.8.2-dev (https://typora.io/releases/dev) fixed this?

[hbsmith]

@abnerlee performance on 1.8.2-dev does seem better for me. It doesn't fix #5921 though.