Comment #15 on issue 265 by m.niloc: Slow pasting
http://code.google.com/p/yi-editor/issues/detail?id=265
This small change speeds up Yi in my test from 5.5s to 3.5s. It is ugly and
I don't
think it should be committed; my only point here is to demonstrate that
prepareAction
is definitely performance-critical.
hunk ./Yi/UI/Vty.hs 292
tabWidth = tabSize . fst $ runBuffer win b indentSettingsB
prompt = if isMini win then miniIdentString b else ""
- (rendered,toMarkPoint',cur) = drawText h' w
+ (rendered,_,cur) = drawText h' w
fromMarkPoint
point $
tabWidth
hunk ./Yi/UI/Vty.hs 298
([(c,(wsty, (-1))) | c <- prompt] ++
bufData ++ [('
',(wsty, eofPoint))])
-- we always add one character which can be
used to
position the cursor at the end of file
+ bufDataPlain = setSty undefined text
+ (_,toMarkPoint',_) = drawText h' w
+ fromMarkPoint
+ point $
+ tabWidth
+ ([(c,(wsty, (-1))) | c <- prompt] ++
bufDataPlain ++
[(' ',(wsty, eofPoint))])
+ -- we always add one character which can be
used to
position the cursor at the end of file
(_, b') = runBuffer win b (setMarkPointB toM toMarkPoint')
(modeLine0, _) = runBuffer win b $ getModeLine (commonNamePrefix e)
modeLine = if notMini then Just modeLine0 else Nothing
For timing I'm using the LaTeX test HackerMain.hs above renamed to Main.hs,
plain
"cabal configure" so no profiling, and a shellscript using the "empty"
terminal
redirection tool: "empty -f -i in -o out -f ./yi && time cat out
>/dev/null".
Before:
$ sh time
real 0m5.473s
user 0m0.000s
sys 0m0.000s
After:
$ sh time
real 0m3.499s
user 0m0.000s
sys 0m0.004s
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