At Tue, 26 Apr 2011 17:43:57 -0400, Vincent St-Amour wrote:
> we're losing pretty hard on deriv.

It looks like 20% of the time can be saved by JIT-inlining the
`procedure-arity-includes?' check that `map' performs. (And I've been
meaning to make that JIT change anyway, since it's an obstacle to using
`map' in futures.) I'll push a change soon.

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