Follow up to #7240, Bookmark import reduces performance when trying to open bookmarks from bookmark toolbar

[srirambv]

• Did you search for similar issues before submitting this one?
  Yes

• Describe the issue you encountered:
  Browser performance reduces when large amount of bookmarks are imported

• Platform (Win7, 8, 10? macOS? Linux distro?):
  All

• Brave Version (revision SHA):
  Brave 0.17.4
  rev 39c7a53
  Muon 4.1.2

• Steps to reproduce:

  1. Import a large bookmark HTML file
  2. Open a new tab and visit any site/the one that is bookmarked
  3. Bookmark toolbar -> Imported folder -> Open bookmark folder

• Actual result:
  Bookmark import reduces performance when trying to open bookmarks from bookmark toolbar

• Expected result:
  Imported bookmarks should not impact browser performance

• Will the steps above reproduce in a fresh profile? If not what other info can be added?
  Yes

• Is this an issue in the currently released version?
  Yes

• Can this issue be consistently reproduced?
  Yes

• Extra QA steps:
  1.
  2.
  3.

• Screenshot if needed:

• Any related issues:
  Browser performance reduces when large amount of bookmarks are imported #7240
  Please change milestone if required

[LaurenWags]

+1 from Community, user has approx 1000 bookmarks. https://community.brave.com/t/rearranging-bookmarks/4666

[alexwykoff]

@srirambv can you confirm this is fixed in 0.19.x?

[darkdh]

#10054 has specified the cause for this problem

[srirambv]

@alexwykoff Performance is much much better than before. Its not completely smooth usage. I still see some lag in scrolling through bookmarks in nested folders and see quite a high CPU usage

[alexwykoff]

this is covered by #10054