To test algos use:
$ dub run --compiler=ldc2 --build=release -- --checks$ dub run --compiler=ldc2 --build=release══════════════════════════════════════════════
max string length: 100
iterations: 100000
Dark Hole 2 100.00% ( 9.48ms) ▐████▌
basic2 102.00% ( 9.69ms) ▐████▌
unrolled chunks 2 102.00% ( 9.71ms) ▐████▌
unrolled chunks 64 104.00% ( 9.86ms) ▐████▋
unrolled chunks 16 106.00% ( 10.08ms) ▐████▊
SIMD convert 115.00% ( 10.97ms) ▐█████▎
stackoverflow 163.00% ( 15.46ms) ▐███████▋
Dark Hole 212.00% ( 20.17ms) ▐██████████
basic 4192.00% ( 397.35ms) │ (too big)
══════════════════════════════════════════════
max string length: 1000
iterations: 10000
unrolled chunks 16 100.00% ( 3.78ms) ▐████▌
unrolled chunks 64 102.00% ( 3.88ms) ▐████▌
SIMD convert 113.00% ( 4.28ms) ▐█████▏
unrolled chunks 2 113.00% ( 4.30ms) ▐█████▏
basic2 115.00% ( 4.36ms) ▐█████▎
Dark Hole 2 117.00% ( 4.45ms) ▐█████▎
stackoverflow 314.00% ( 11.89ms) ▐███████████████▏
Dark Hole 368.00% ( 13.92ms) ▐█████████████████▉
basic 13617.00% ( 514.88ms) │ (too big)
══════════════════════════════════════════════
max string length: 10000
iterations: 1000
unrolled chunks 16 100.00% ( 3.47ms) ▐████▌
unrolled chunks 64 106.00% ( 3.68ms) ▐████▊
SIMD convert 109.00% ( 3.78ms) ▐████▉
unrolled chunks 2 111.00% ( 3.85ms) ▐█████
Dark Hole 2 116.00% ( 4.03ms) ▐█████▎
basic2 119.00% ( 4.13ms) ▐█████▍
stackoverflow 336.00% ( 11.66ms) ▐████████████████▎
Dark Hole 404.00% ( 14.02ms) ▐███████████████████▋
basic 46016.00% ( 1595.39ms) │ (too big)