zlib performance

[yawniek via Digitalmars-d-learn]

On Friday, 7 August 2015 at 08:50:11 UTC, Daniel Kozák wrote:
>> > ldc[2] -O -release -boundscheck=off -singleobj  app.d
>> 
>> 
>> ldc 0.15.2 beta2
>> 2.86s user 0.55s system 77% cpu 4.392 total
>> 
>> v2.068-devel-8f81ffc
>> 2.86s user 0.67s system 78% cpu 4.476 total
>> 
>> v2.067
>> 2.88s user 0.67s system 78% cpu 4.529 total
>> 


i can now reproduce the results and indeed, its faster than zcat:
on a c4.xlarge aws instance running archlinux and dmd v2.067
same file as above on my macbook.

best run: 2.72s user 0.39s system 99% cpu 3.134 total
worst run: 3.47s user 0.46s system 99% cpu 3.970 total

zcat:
best: 4.45s user 0.28s system 99% cpu 4.764 total
worst: 4.99s user 0.57s system 99% cpu 5.568 total


so i guess on os x there is still something to be optimized