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

[Ralph Becket]

Zoltan Somogyi, Tuesday, 11 January 2005:
> I now get an 8.1% speedup, not a 1.7% slowdown.

Spectacular!

> That is the biggest single speedup of the compiler I can remember since
> we fixed the bug that caused our 2-3-4 trees to be unbalanced.

When you profiled the compiler, did you profile the whole thing or just
specific parts?  If the former, were any other hotspots apparent?

-- Ralph
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