Re: [Boost-users] [MSM] state transitions and exceptions

on Thu Mar 29 2012, "Christophe Henry" wrote:

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Jurai,

On Thu, Mar 29, 2012 at 7:07 PM, Juraj Ivančić wrote:

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I know how you feel. MSM is an awesome library. Unfortunately compilers tend to disagree :)

I'd say compilers should be blamed for this ;-) (I'm still wondering how it can be that compilers make such a poor use of my 6 cores with hyperthreading when compile a single object file...)

There isn't much inherent parallelism to exploit in C++ compilation of a single translation unit.

-- Dave Abrahams BoostPro Computing http://www.boostpro.com

I'm not an expert in this field, but this surprises me a bit. I understand that there is not much parallelism in parsing a file, but after? Taking msm as example. Most of the compile time comes from template instanciations of the function process_event for every event type. Adding support for a new event adds roughly the same compilation time. Every process_event has little in common with other process_event instances. What prevents the compiler from handling each at the same time? Christophe