Naive node.js faster than naive LDC2?

[James Lu]

Code: 
https://gist.github.com/CrazyPython/364f11465dab90d611ecc81490682680

LDC 1.23.0 (Installed from dlang.org)

ldc2 -release -mcpu=native -O3 -ffast-math --fp-contract=fast

Node v14.40 (V8 8.1.307.31)

Dlang trials: 2957 2560 2048 Average: 2521
Node.JS trials: 1988 2567 1863 Average: 2139

Notes:

  - I had to reinstall Dlang from the install script
  - I was initially confused why -mtune=native didn't work, and 
had to read documentation. Would have been nice if the compiler 
told me -mcpu=native was what I needed.
  - I skipped -march=native. Did not find information on the wiki 
https://wiki.dlang.org/Using_LDC
  - Node.js compiles faster and uses a compilation cache

Mandatory citation: https://github.com/brion/mandelbrot-shootout