[racket] Optimization; converting 'Float' to 'Fixnum' in Typed Racket

From: Vincent St-Amour (stamourv at ccs.neu.edu)
Date: Sat Feb 18 23:20:29 EST 2012

At Sat, 18 Feb 2012 22:14:05 -0600,
Robby Findler wrote:
> What if his code used fx+ and friends instead of + and friends?

`fx+' and friends are not as fast as `unsafe-fx+' and friends, but
since they're guaranteed to return fixnums (or error), they're more
TR-friendly. Good point.


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