Performance of tables slower than built in?

[Ola Fosheim Grøstad]

On Thursday, 23 May 2019 at 21:47:45 UTC, Alex wrote:
> Either way, sin it's still twice as fast. Also, in the code the 
> sinTab version is missing the writeln so it would have been 
> faster.. so it is not being optimized out.

Well, when I run this modified version:

https://gist.github.com/run-dlang/9f29a83b7b6754da98993063029ef93c

on https://run.dlang.io/

then I get:

LUT:    709
sin(x): 2761

So the LUT is 3-4 times faster even with your quarter-LUT 
overhead.