On Wednesday 20 of June 2012, Norbert Thiebaud wrote:
On Tue, Jun 19, 2012 at 7:32 AM, Lubos Lunak <l.lunak@suse.cz> wrote:
[...] PCH with
MSVC avoid the performance hit of using many -I options (adding -I for
each <module>/inc adds 25% time for whatever reason, but only without
PCH)
ahh, so that is _not_ a myth. Thanks for the data point.
Don't forget the point that PCH negates it :). If it turns out that PCH on
Windows is actually feasible now, I wouldn't consider that a blocker.
PS: what is the perf impact if any on GCC to use the pch include
layout (that is even the pch feature, but over-including headers)
If that overhead is not prohibitive then we could use that way of
doing include _always_... and therefore the pch layout would be
maintained 'naturally'.
It about doubles the time for building xmloff (assuming I understood
correctly that you meant using PCH include layout without GCC's PCH support
activated).
--
Lubos Lunak
l.lunak@suse.cz
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