Re: [boost] What's wrong with this benchmark

Subject: Re: [boost] What's wrong with this benchmark
From: Thorsten Ottosen (tottosen_at_[hidden])
Date: 2016-02-17 11:34:47

On 16-02-2016 18:56, Benedek Thaler wrote:
> Dear Boost,
>

> What do I miss here?

Hard to say. I guess instruction order may have an impact on the branch 
prediction. But please include a test with unsafe_push_back() for 
comparison also.

Some more questions:
A. is the lambda optimized away?
B. Do the test run the same number of times? Is it asserted at runtime?
C. Do you compile via bjam? I mean, is all the right flags present, e.g. 
NDEBUG=1?
D. How does the actual code between std::vector and devector compare? 
Maybe there could be hints to the difference.

regards

Thorsten