gdc or ldc for faster programs?

[Ali Çehreli]

On 1/25/22 12:42, H. S. Teoh wrote:

 >> For a test run for 2 million numbers:
 >>
 >> ldc: ~0.95 seconds
 >> gdc: ~0.79 seconds
 >> dmd: ~1.77 seconds
 >
 > For measurements under 1 second, I'm skeptical of the accuracy, because
 > there could be all kinds of background noise, CPU interrupts and stuff
 > that could be skewing the numbers.  What about do a best-of-3-runs with
 > 20 million numbers (expected <20 seconds per run) and see how the
 > numbers look?

Makes sense. The results are similar to the 2 million run.

 > But these sorts of statements are just generalizations. The best way to
 > find out for sure is to disassemble the executable and see for yourself
 > what the assembly looks like. :-)

I posted the program to have more eyes on the assembly. ;)

Ali