Re: Register keyword necessary anymore?
Re: Register keyword necessary anymore?
- Subject: Re: Register keyword necessary anymore?
- From: Stefan Werner <email@hidden>
- Date: Wed, 18 Apr 2007 09:48:01 -0700
On Apr 18, 2007, at 9:10 AM, email@hidden wrote:
Sure, but my app is run on hundreds of machines across many
different PPC/x86 CPUs. I can tune to anything specific, and I
know there's no real answer and it depends on a lot of factors, but
what I'm looking for is a general idea of how good ggc is at this
point. 2 years ago adding register keywords would show a dramatic
speed increase. I will be doing some more testing on my PPC, but
I'm worried about the x86 stuff.
Nothing can replace testing - bottlenecks are often not where you
think they are. Build a benchmark and try to get results from all
kinds of configurations. And the absolute #1 tip for writing fast
software on OS X is: use Shark. Don't try to optimize before profiling.
Stefan
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