Hi Terry,
It shouldn't matter much. Both propeties and variables exist in memory,
if the stack containing the property is loaded into memory. If the stack
it on disk but not in memory, it will be loaded the first time you
access the property and may call a small delay.
If you have many nested properties, I could imagine that calling
properties like
put the cProp["key1"]["key2"] into myArray
put the keys of myArray into myKeys
sort lines of myKeys numeric by item 1 of each
put myArray[line x of myKeys] into MyVar
-- etc
things may get awkwardly slow, but if you're just reading directly from
a property, the difference with a local variable should be really small.
If you want to know for sure, a few simple extra statements that put the
milliseconds into a variable will show you the difference, as you
already suggested.
There is one little thing that might affect speed and you really would
have to rest this. LiveCode might look for a getProp handler when you
call a property. This might take a millisecond or so. This is the only
reason I can come up with, why using variables might be quicker.
If you think that your script is getting slow, there is probably another
reason for it and using either properties or variables won't solve this
issue. Perhaps you're having trouble because you're intervening with the
GUI. If you explain what you're trying to do, perhaps we can find a
better way to do it.
--
Best regards,
Mark Schonewille
Economy-x-Talk Consulting and Software Engineering
Homepage: http://economy-x-talk.com
Twitter: http://twitter.com/xtalkprogrammer
KvK: 50277553
Use Color Converter to convert CMYK, RGB, RAL, XYZ, H.Lab and other
colour spaces. http://www.color-converter.com
Buy my new book "Programming LiveCode for the Real Beginner"
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On 3/10/2014 11:24, Terence Heaford wrote:
I am just a beginner with LC and don’t want to spend hours reinventing the
wheel so was hoping that someone can advise me which of the following is the
quicker.
I could go down the milliseconds route with every script I produce but….
Is there a general rule that says
put the uRows of me into tRows
put line tRecNum to tRecNum + tRows - 1 of the uSelected of me into
tSelectedData
is quicker than using
put line tRecNum to tRecNum + the uRows of me - 1 of the uSelected of me into
tSelectedData
or does it not really matter
It is being used with a scrollbar so gets called quite a lot and tRows/the
uRows of me appears in a number of lines in the method
All the best
Terry
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