On Wed, Nov 4, 2015 at 1:22 PM, Filip Pizlo <fpi...@apple.com> wrote:
> > On Nov 4, 2015, at 10:03 AM, Alfonso Guerra <hupernike...@gmail.com> > wrote: > > was ~20% faster on my machine. > > > It’s very surprising that this made any difference. Compilers are > ordinarily smart enough to understand the equivalence of ++x and x++ if the > result is unused. Are you sure you compiled with optimizations enabled? > I hadn't. With full optimizations and tweaking of the driver to prevent the compiler from optimizing away invocation of the functions entirely, the difference is only ~1.3-3.3%. No longer as substantial. It beats Lightspeed C, but it's best not to depend on optimization for code which is modeled on an obsolete processor architecture, and is so easy to write. Doubly so when using non-optimized builds for development. Alfonso
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