RE: AS 2.0 optimising.. 2004-03-16 - By ryanm
Back
> In the last example the lookup of a word is very fast, because u dont need
> to loop.
>
> What im trying to say is that the difference in speed depends on the
usage.
>
Right, but in an individual lookup, using a numeric index is faster and
uses less memory than a string. If you *have* to loop through a bunch of
items, then an array will be faster. If you can avoid the loop by going
directly to the object you need by name, then an array obviously isn't a
good choice. That choice is easy, the place where this becomes important is
in the difference between these:
for(var i=0;i<limit;i++){
doSomething(object["sub"+i]);
}
or
for(var i=0;i<limit;i++){
doSomething(object[i]);
}
The second should execute faster, the amount varying directly with the
size of the integer "limit".
ryanm
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