Re: Qi Symbols parser performance

On 13-01-18 19:36, Stephan Menzel wrote:
> May I ask, how did you get these results? 98 ns strikes
> me as very impressive.

It was on

  * linux 64 bit kernel 4.4.0-103-generic
  * Intel(R) Core(TM) i7-3770K CPU @ 3.50GHz
  * g++ 7.x (I guess, it could also have been the default g++ 5.4.1 of
    the box)
  * optimized and targeting the native architecture

So. Indeed, I already noticed the timings on rextester (MSVC) weren't up
to par but didn't investigate (I don't have a windows machine).

Lambda runs took 1407315349 nanoseconds
Qi     runs took 8304731 nanoseconds
Map    runs took 8311891 nanoseconds

I guessed it was down to optimization flags, debug iterators. Also keep
in mind that there have been problems with the accuracy of MSVC's chrono
implementations.



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