"David Abrahams" <dave@boost-consulting.com> wrote in message news:87psal1e9x.fsf@pereiro.luannocracy.com...
"Gennadiy Rozental" <gennadiy.rozental@thomson.com> writes:
"David Abrahams" <dave@boost-consulting.com> wrote in message news:87lkl93hlx.fsf@pereiro.luannocracy.com...
"Gennadiy Rozental" <gennadiy.rozental@thomson.com> writes:
This is not clear cut. I do not see in theory why any boost::variant based algorithm couldn't be optimized to almost the same code (module type switching). On the other hand excessive usage of tuples will cause appropriate code bloat, eventually leading to code slow down.
Not clear cut at all. When operating on a sequence where all the types are different, the version with variant will be both slower and larger.
I love these performance "estimations"
Do you have any numbers to sustain this?
No, sorry. It's simply obvious.
Feel free to prove me wrong if it isn't obvious to you.
Nah. I don't really care. Just that after many years of optimizing performance critical code I gave up doing any "estimations". I was proven wrong too many times, so that even test program is not real prove. There are way too many factors that affect performance of real-life applications. Sometimes the same code compiled with different compilers of in different hardware will exhibit completely different performance pattern. We could talk about trends. And in this case I believe trends could be different depending on circumstances. Gennadiy