[plt-dev] JFYI editor performance note

From: Matthew Flatt (mflatt at cs.utah.edu)
Date: Fri Apr 17 17:05:37 EDT 2009

At Fri, 17 Apr 2009 13:48:57 -0700, John Clements wrote:
> On my ancient PPC G5 cheese-grater, svn head editors are very very  
> slow relative to 4.1.4. I note the following things:
> 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.

>From my measurements, many core editor operations now take 6-10 times
as long as before. Even, the operation of inserting a character
shouldn't take 1/10 second. I'll investigate into this example

> 2) Pasting text from one buffer into another is a particular problem,  
> often taking many seconds.

Pasting has some deeper problem, which is still under investigation.

Thanks for the data points!

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