Messages in this thread |  | | Date | Wed, 1 Nov 2000 01:32:21 +0100 (CET) | From | Ingo Molnar <> | Subject | Re: 2.2.18Pre Lan Performance Rocks! |
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On Tue, 31 Oct 2000, Jeff V. Merkey wrote:
> > One could create a 'kernel' that does: > > for(;;) > > { > > proc0(); > > proc1(); > > proc2(); > > proc3(); > > etc(); > > } > > would be coded like this (no C compiler): > > proc0: > > proc1: > > proc2: > > proc3: > > etc: > > label: > jmp proc0
oh, and what happens if it turns out that some other place wants to call proc3 as well? Recode the assembly - cool! Not.
> I just avoided 5 x 20 bytes of pushes and pops on the stack ad optimized > for a simple fall through case.
FYI, GCC does not generate 5 x 20 bytes of pushes and pops. In fact in the above specific case it will not generate a single push (automatically - you dont have to worry about it).
Ingo
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