Performance Notes

Well, even with GMP, it’s guaranteed to be slow. Good enough if you need a dozen numbers or so.

Performance test

  • Secure engine is mostly unaffected by the choice of backend (except for nextInt() case)

  • PHP 7:

    • With GMP installed, all engines are approximately 400 times slower than native

    • Mersenne Twister is consistently 400 times slower than native, whether you use GMP or not

    • PCG is 100 times slower without GMP and xoshiro256** is 50 times slower without GMP

  • PHP 8:

    • 100-150 times slower than native

    • GMP presence does not affect performance that much, but PCG will run twice as fast

    • JIT helps almost as much as GMP (use both for max performance)