Re: [boost] Is a 3% timing difference reliably repeatable in real code?

From: Darin Adler (darin_at_[hidden])
Date: 2003-05-08 12:27:06

On Thursday, May 8, 2003, at 10:07 AM, Beman Dawes wrote:

> I notice the examples you give are JavaScript.

Sorry I wasn't clear. The examples I gave were speed improvements to a 
JavaScript interpreter, written in C++.

> For example, some C++ compilers are a lot more aggressive about 
> inlining than others. For some of the code I've timed, a change slowed 
> results for a compiler that failed to inline it, but ran quicker for 
> the compiler that was good at inlining.

Yes. That particular issue, difference in inlining, is a major problem 
for portability of performance optimizations for C++ code that I've 
encountered too.

     -- Darin