On 31/10/2014 04:04, Richard Gaskin wrote:
Alex Tweedly wrote:
Hmmmm - I said this once before :-) :-)
My apologies for the inconvenience. I'd either missed it before or
completely forgot about it, but the latter seems unlikely given how
remarkable the post was:
Oh Richard - I even threw in 2 smiley faces so you would *know* I was
teasing you :-)
in 5.5.3
name takes 830 ms while id takes only 250 ms
but in 6.0 (i.e. with id caching)
name takes 830 ms while id takes 5 ms
-- Alex.
What I find most remarkable is the way your benchmark makes the value
of this ID caching seem rather trivial.
I trust this was a one-liner, as I can't imagine them spending much
time optimizing something so very specialized and which takes so
little execution time per iteration.
I wonder what prompted this one...perhaps something specific to the
coding style of the person who wrote the Project Browser?
It is a trivial example - but the speed-up of 50X seems significant.
It's not just *the* most recent ID that is cached (at least according to
a simple-minded test I did - see the original thread for details). It
does appear that it speeds up access to a number of cached IDs. So if
you had a lot of controls (Datagrid ??) and were doing something to them
multiple times (scrolling?, fading in/out, ...) then maybe it would be
noticeable, if not actually significant.
Anyway - this is one way to test it - whether or not you find it useful.
Probably worth adding it to the compare-engine-versions benchmark; I'll
do that once a framework / sample of that happens.
--Alex.
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