Performance: slow when long lists are folded, but fast when unfolded

Bug reports
,
1

Steps to reproduce

  • Create a note with ~5000 words, bulleted lists. The problem doesn’t appear on notes with ~1000 words
  • Fold the lists so it fits on a page.
  • Try shifting a line up, for example. Headers specifically take longer to re-render (slower on mobile)
  • The problem does not appear when lists are unfolded, or folded and in a code fence.

Did you follow the troubleshooting guide? [Y/N]

Yes, tried in Sandbox.

Environment

MacOS: 15.7.x

iPadOS, iOS: 18.7.x

Obsidian: 1.11.5

2

Please

  1. Attach, link, dm me a note where this happens
  2. Provide the output of “show debug info command”
  3. Attach or link to a screen recording showing this problem happening in the sandbox vault.

Thanks

3

I am adding here the test file you provided. Test file.md (16.4 KB)

I am able to reproduce a slowdown but I have to cripple my CPU performance to perceive a difference.

What are your computer specs exactly?

4

It’s barely noticable on my M1 mac. But on both mobile devices, it’s much worse. And the folding is more important on mobile with limited screen size.

5

was going to create a new topic about somethign similar:

the rendering/loading is extremely poor if the page is of any extended length.

i had a markdown table of more than 3500 lines and more than 9 columns and it was completely unusable. for finding in page or editing.

much smaller programs like notepad++ handle without issue