I just realized/remembered what a big win the Racket JIT is. Thank you
for JIT!
(After hand-optimizing some legacy code today, speeding it up 7x, I
thought I'd disable the JIT, to get the profiler to drill down past some
inlining in the remaining hotspot. I disabled the JIT, ran the code,
and then waited, and waited, and went to the kitchen and started making
a split pea soup, and waited.... Looks like the Racket 5.3.4 JIT alone
is giving us slightly over 20x speedup on this particular
performance-sensitive code. Some of the code in this system was written
for PLT 103 or 200, so the JIT coming along sometime after that has
probably been a lifesaver as the system grew.)
Neil V.
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