On Thu, Jul 24, 2014 at 4:41 AM, Bert Freudenberg <bert at freudenbergs.de>
wrote:

> While working on my SqueakJS VM (which now can run a current 4.5 image)
> I'm discovering a lot of gross inefficiencies. I have no time (or much
> desire) to fix these, but would anybody think it's valuable if I post them
> here? For example:
>
> ScrollBar>>initializeSlider
> ScrollBar>>sliderColor:
> ScrollBar>>updateSliderColor:
> Color class>>gray:
> Color>>setRed:green:blue:
> Float>>rounded
> Float>>sign
> Float>>>
> Number>>adaptToFloat:andCompare:
> Float>>asTrueFraction
> Integer>>bitOr:
>
>
Oh man, we should _really_ take a look at those lower-level ones in the
Number hierarchy.  There could be some low-hanging cog-like-turbo-boost
fruit lurking in there..



> ctx[5]=rcvr: 3436915608L
> ctx[6]=tmp0: 16r10000000000000L
> ctx[7]=tmp1: nil
>
> Converting a Float to an exact Fraction just to find out its sign seems
> very much unnecessary. And without the LargeInteger primitive support it
> also is really really slow.
>
> My VM-level debugger makes it easy to stop at any time and look what's
> taking so long, so that's how I come across these.
>
> - Bert -
>
>
>
>
>
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.squeakfoundation.org/pipermail/squeak-dev/attachments/20140724/9d694ca8/attachment.htm