[Mono-devel-list] StringBuilder patch

Piers Haken piersh at friskit.com
Mon Jan 12 15:15:39 EST 2004

> > +			if (_length < (_str.Length / 2))
> Use a shift directly here, instead of the division, so we 
> don't have to bother optimizing it.

'GCC -O3' doesn't do this? You gotta be kidding me! (the JIT <i>can</i>
shift this, right?)

BTW: speaking of JIT optimizations, here's a few questions:

- who's up for guessing the best x86 asm for this:
    int foo (int i) { return (i == 0) ? 3 : 7; }
    <hint> no branches </hint>

- how common is this construct?

- how easy would it be to implement support for this kind of optimization in
the current JIT framework.


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