math.log() benchmark of first 1 billion int using std.parallelism

[Iov Gherman via Digitalmars-d-learn]

> And what about single threaded version?

Just ran the single thread examples after I moved time start 
before array allocation, thanks for that, good catch. Still 
better results in Java:

- java:
21 secs, 612 ms

- with std.math:
dmd: 23 secs, 994 ms
ldc: 31 secs, 668 ms
gdc: 52 secs, 576 ms

- with core.stdc.math:
dmd: 30 secs, 724 ms
ldc: 30 secs, 988 ms
gdc: time: 25 secs, 970 ms