vim is too slow when editing *.ass file. about vim

[chrisbra]

a few things to check: Is it slow when turning off syntax highlighting? If yes, please use :syntime to find the slow pattern and check with the maintainer of the syntax file if he has an idea how to improve that particular pattern

[chrisbra]

Here is a very simple patch to improve the performance:

diff --git a/runtime/syntax/ssa.vim b/runtime/syntax/ssa.vim
index a5dbf37c3..e7e76aa2b 100644
--- a/runtime/syntax/ssa.vim
+++ b/runtime/syntax/ssa.vim
@@ -29,7 +29,7 @@ syn match ssaTime /\d:\d\d:\d\d\.\d\d/ contained skipwhite nextgroup=ssaDelimite
 syn match ssaDelimiter /,/ contained skipwhite nextgroup=ssaField,ssaTime,ssaText

 " Text
-syn match ssaText /\(^Dialogue:\(.*,\)\{9}\)\@<=.*$/ contained contains=@ssaTags,@Spell
+syn match ssaText /\(^Dialogue:\([^,]*,\)\{9}\)\@100<=.*$/ contained contains=@ssaTags,@Spell
 syn cluster ssaTags contains=ssaOverrideTag,ssaEscapeChar,ssaTextComment,ssaItalics,ssaBold,ssaUnderline,ssaStrikeout

 " Override tags

ping @ObserverOfTime

[xvim64]

Here is a very simple patch to improve the performance:

+syn match ssaText /(^Dialogue:([^,],){9})@100<=.$/ contained contains=@ssaTags,@spell

ping @ObserverOfTime

Thank you!
This patch works really well.