convert to lower ascii 128?

Mark Smith lists at futilism.com
Thu Feb 5 19:27:08 EST 2009


While we're on displacement activities :)

One of the things that can slow Rev down in a long for loop is the  
building up of a long output string (I suspect that an awful lot of  
copying and moving of memory starts to happen).


I made a little test of something suggested by someone on this list  
(Eric Miclo?), that is, that it can be noticably quicker to build up  
a long string into a file rather than a variable when dealig with a  
lot of data. What I found on this 2.16G MacBookPro was that after you  
get to sizes bigger than a few Mb, for each doubling of size, writing  
to a file doubles the time, while using a variable quadruples the time.

If you're interested, you can get the stack I made from: http:// 
maspub.s3.amazonaws.com/listTest.rev

Best,

Mark

On 5 Feb 2009, at 19:45, Ben Rubinstein wrote:

> all functions are slightly faster if the source string contains  
> more high-code characters (ie if the output string is shorter)




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