Dave Cragg wrote:
On 4 Jul 2005, at 20:07, Eric Chatonet wrote:
Hi Dennis,
I agree since I provide many tools for the community that are made to
run in the IDE.
I agree too. :)
So I never use globals but I prefer to refer to some custom
properties stored in specific custom property sets in my plugins or
in the revPreferences stack.
BTW, I found that referring to custom properties is as fast as using
global variables and they don't vanish when they are stored in
revPreferences.
That's great :-)
Eric, my own testing shows that accessing custom properties is
significantly slower than accessing globals. (Over 20 times slower in a
simple test.) When I have to refer to custom properties frequently (for
example when going through hundreds of elements of a
customPropertySet), I usually copy them to a variable first. But
perhaps the access times vary by circumstances.
This was the most recent test I ran.
global gTest
on mouseUp
set the cTest of me to 100
put 100 into gTest
put 100000 into tTimes
put the milliseconds into tStart
repeat tTimes
get gTest
end repeat
put the milliseconds - tStart into tOut
put the milliseconds into tStart
repeat tTimes
get the cTest of me
end repeat
put cr & the milliseconds - tStart after tOut
put tOut
end mouseUp
That sounds slow expressed as relative figures, but when we look at the
speed per access it's not so bad for many uses:
Milliseconds per access for-
global: 0.00058
property: 0.00441
function: 0.00297
I usually use functions instead of constants for constant-like things,
as they have the same read-only benefit of true constants but have the
convenience of not requiring declaration. In this test I had this
function in the card script:
function cTest
return 100
end cTest
I was surprised the function call was so fast relative to accessing a
property, but either way isn't so bad for occassional access. If you're
doing a lot of processing of the data you could copy it to a local var
during the heavy lifting.
--
Richard Gaskin
Fourth World Media Corporation
___________________________________________________________
[EMAIL PROTECTED] http://www.FourthWorld.com
_______________________________________________
use-revolution mailing list
[email protected]
Please visit this url to subscribe, unsubscribe and manage your subscription
preferences:
http://lists.runrev.com/mailman/listinfo/use-revolution
