On 3/3/13 10:48 PM, J wrote:
Dear D pros,
As a fan of D, I was hoping to be able to get similar results as this
fellow on stack overflow, by noting his tuning steps;
http://stackoverflow.com/questions/5142366/how-fast-is-d-compared-to-c
Sadly however, when I pull out a simple matrix multiplication benchmark
from the old language shootout (back when it had D), it is disturbingly
slower in D when pit against C++.
You're measuring the speed of a couple of tight loops. The smallest
differences in codegen between them will be on the radar. Use straight
for loops or "foreach (i; 0 .. limit)" for those loops, the foreach
forms you currently may introduce slight differences in codegen.
Andrei
