[Haskell-cafe] Optimization demonstration

Brandon Allbery allbery.b at gmail.com
Tue Feb 27 15:38:00 UTC 2018

On Tue, Feb 27, 2018 at 10:06 AM, Dušan Kolář <kolar at fit.vut.cz> wrote:

> Unfortunately, in this case the C is much more faster (it prints the
> result immediately), at least on my machine. Is it due to a fact that C
> compiler does a brutal optimization leading to compile-time evaluation,
> while ghc is not able to do that?
ghc is less prone to invoke that kind of optimization, but sometimes can do
so. And yes, gcc is decidedly "brutal" with -O2: inspect the generated
assembler and you'll find that it just prints a constant.

brandon s allbery kf8nh                               sine nomine associates
allbery.b at gmail.com                                  ballbery at sinenomine.net
unix, openafs, kerberos, infrastructure, xmonad        http://sinenomine.net
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