[plt-dev] JFYI editor performance note

From: Matthew Flatt (mflatt at cs.utah.edu)
Date: Fri Apr 17 21:49:37 EDT 2009

At Fri, 17 Apr 2009 13:48:57 -0700, John Clements wrote:
> 1) I can get *way* ahead of the keystroke buffer.  In particular, if I  
> type 160 characters quickly, it takes svn head 15 seconds to get them  
> all onto the screen.  In 4.1.4, on the other hand, DrScheme takes them  
> as fast as I personally can type them, in this case 154 chars in 5  
> seconds.  So, this is at least 3 times as fast, possibly much more.

I was able to see the same effect with my old PPC machine. This is now
fixed in SVN.

The problem was that every keystroke would trigger a redraw for the
whole canvas, instead of just the line where the character was

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