Benchmarking sigmoid function between C and D

[Arun Chandrasekaran]

On Saturday, 7 April 2018 at 23:48:36 UTC, kinke wrote:
> On Saturday, 7 April 2018 at 20:33:13 UTC, Arun Chandrasekaran 
> wrote:
>> [...]
>
> As this appears to be benchmarking mostly the 
> std.math.exp(float) performance - some/many basic algos in 
> std.math, incl. exp(), are currently using the x87 FPU for all 
> 3 floating-point types, although there are treacherous 
> float/double overloads, sacrificing performance in many cases.
> See 
> https://github.com/dlang/phobos/pull/6272#issuecomment-373967109 (and the later numbers for current Intel and GCC compilers) for a performance comparison of some std.math algos incl. exp(). For LDC, the double/float versions of the few worked-on algos in that PR were sped-up by an overall factor of 3 [but only by 1.46 for exp(float)].

Interesting to see this, thanks! Did you also generate the bar 
graph plot using D?