On Wed, Jun 10, 2009 at 12:13 PM, Richard Webb<richard.webb@boldonjames.com> wrote:
fwiw:
I've done a few quick tests on a lib i'm working on (a Windows DLL built with VC9).
The lib has 27 public headers which currently contain both normal include guards and #pragma once, and takes ~45 seconds to compile+link. I've tried building it with just include guards, and with just #pragma once, and theres no noticable difference between the build times.
I was going to suggest that a toy example showing that #pragma once is beneficial is useless. We need different, more concrete evidence, like "Adding #pragma once to boost::whatever headers improves compile times for the user by X%". Emil Dotchevski Reverge Studios, Inc. http://www.revergestudios.com/reblog/index.php?n=ReCode