RB clear winner in speed test
Chris Yavelow
Chris at yav.com
Tue Apr 20 20:40:22 EDT 2004
Hi all,
Thanks for the help in working this out. The people from the
Revolution list had gradually optimized the code for 3-word strings.
I have generated new search data consisting of random lengths from 3
to 7 words and the effect on the Revolution speed is staggering,
while there is no effect on the RB speed.
The new search data list is here with the sample projects:
http://www.yav.com/speed.html
Some things I discovered with this that are relevant here are:
1) Loading the file as a binary stream (suggested by Seth Willits and
others) is blindingly faster than loading the data as a normal text
file.
2) The following contstruction (using "join") is no slower than using
a loop to construct the variable from the array
matches=join(STarray,(chr(13)))
3) Bill Johnson's suggestion involving tracking the string length
with ".LenB" then making a MemoryBlock and so forth, while being
wicked cool, is not significantly faster than the simple one-line
"instrb" approach used in the project (it's only about 1% faster)
4) Hiding the fields before filling them has the same dramatic impact
on display speed as the following Charles Yeomans' suggestion, so I
opted not to hide them:
TargetText.SelectAll
TargetText.Seltext =TT
The current scores (representing the total of the three stages: Load
Data, Check Matches, Display All):
RealBasic = 75 ticks
Revolution = 583 ticks
SuperCard = 1464 ticks
Thanks again for all the input.
Chris Yavelow
http://www.ChrisYavelow.com
More information about the use-livecode
mailing list