Posted by Levente Uzonyi-2 on Nov 06, 2010; 8:42pm
URL: https://forum.world.st/RoarVM-The-Manycore-SqueakVM-tp3025321p3030343.html

 
On Sat, 6 Nov 2010, Igor Stasenko wrote:

> I suppose its related to fact, that with small number of cases (like up to 16)
> its not worth using indirect jump, because with branch prediction you
> can achieve same or even better performance.
> That's why i think, modern compilers do not using jump tables.
> Having more than 16 number of cases, is an edge case. Not saying about 256.

I expect a compiler to generate the fastest possible code, if I ask for
that. I think we agree, that gcc doesn't do this.


Levente

>
>
> Btw, I was also thinking that compilers generating jump tables for
> case statements.
>