Search in files: replace-all across many files freezes the UI #3028

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Describe the feature

There is problem currently, if I take 400 files, search with a tiny regex, and then mass replace that across all text, the app will:

1. lag badly
2. Mass replacement is slow

You can test it on ur own with this

ab.zip

Extract it, open the folder with Acode, regex search \ba\b (you can wait it finishes to searcb all or not idk, I waited untill the 100%), and then mass replace it with €%€%.

See the app lag.

(note the loading animated icon is laggy, then the video speeds up a lot, if I tried to navigate the app in that meanwhile it would be not possible.

(oh I used the canvas mode, so maybe I was on the better performance side)

If applicable, add mockups / screenshots to help present your vision of the feature

No response