[m-rev.] diff/for review: improving the compiler's worst case performance

[Zoltan Somogyi]

On 11-Jan-2005, Ralph Becket <rafe at cs.mu.OZ.AU> wrote:
> Zoltan Somogyi, Tuesday, 11 January 2005:
> > I now get an 8.1% speedup, not a 1.7% slowdown.
> 
> Spectacular!

Thanks.

> When you profiled the compiler, did you profile the whole thing or just
> specific parts?

I didn't profile it at all. I located the hotspots by running the compiler
with -V under mdb, repeatedly interrupting it when it took too long between
progress messages, and looking at what it was doing at the times of the
interrupts.

> If the former, were any other hotspots apparent?

The hotspots I fixed were the dominant ones, but now they are fixed, I will
see if they hid any others.

Zoltan.
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