Comment #9 on issue 265 by coreyoconnor: Slow pasting
http://code.google.com/p/yi-editor/issues/detail?id=265

If you are using vty then can you report what version of vty you have  
installed? Run
the command "ghc-pkg list vty" The darcs version of vty (3.1.9) will  
provide higher
performance.

As for async rendering with vty: I agree entirely. I think an initial  
implementation
internal to the vty library should be easy.

Even with vty having performing rending on a separate thread, it may be  
advantageous
for yi to place the syntax processing (for instance) in a separate thread.  
1. That'd
be GUI agnostic and 2. The syntax highlighting thread could be restarted  
when
touchedIndex is modified if the modification occurs before a highlighting  
update
completes. I think #2 might reduce perceived log and reduce performing  
highlighting
work. Though I'm not sure restarting the syntax highlighting thread on  
touchedIndex
modification is really required.

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