gg from bottom of large file slow

Question

gg from bottom of large file slow

tom-adsfund opened this issue 6 years ago · 3 comments

tom-adsfund commented 6 years ago

Large file: https://raw.githubusercontent.com/clojure/clojure/master/src/clj/clojure/core.clj

I'm not sure if there's an obvious way to speed this up.

Answer 1 · 2018-10-01T07:10:33.000Z

(I was doing this to test a parser I was working on -- if you were wondering why someone would do this!)

Answer 2 · 2018-10-03T14:08:22.000Z

Fix committed. I was doing a recalculation of "top of the window" all the way to the beginning of the buffer. For a file with 7000 lines that is around 150 very expensive and unnecessary recalculations. With that in mind I actually think the performance was quite impressive. Thanks for helping me fix that one.

Answer 3 · 2018-10-03T14:12:35.000Z

Interesting reason for the slowness! I'll close this.