Re: The bug where terminal and xcode ran "different"
Re: The bug where terminal and xcode ran "different"
- Subject: Re: The bug where terminal and xcode ran "different"
- From: "Theodore H. Smith" <email@hidden>
- Date: Sun, 11 Feb 2007 20:45:28 +0000
On 11 Feb 2007, at 18:51, Paul Walmsley wrote:
Don't underestimate though the performance improvements you can get
from writing good STL code. I saw a great seminar by Scott Meyers
a while ago where one of the conclusions was 'the guy who wrote the
optimiser is probably smarter than you' :-)
I'll agree he is "probably" smarter for most people.
My first entry into PPC ASM, I found out how to write a "byte scan
loop" in 3 instructions. (That's where you find the first byte in a
string that matches a search byte). CodeWarrior would generate this
loop in 8 instructions. And MrCpp would generate one with 4
instructions.
Mine ran over 2x faster than the CodeWarrior one, and faster than the
MrCpp loop also.
If all these smart guys can get the most simplest of things wrong...
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