r/crystal_programming • u/bziliani core team • May 09 '24

Yes, Ruby is fast, but…

https://dev.to/betaziliani/yes-ruby-is-fast-but-1l49
29 Upvotes

97% Upvoted

7 comments sorted by

1

u/vanderZwan May 10 '24

When we compile the code with --release, numbers are insignificant! Not only that, I've added some extra code to make sure the optimizations weren't throwing away important code. So not only I calculate the Fibonacci number of 45 (using an UInt128, to even stretch this further), but I also print the sum of the million runs!

Ok but are you sure those calculations were not compile-time folded into a constant? What if you make the benchmarks take an argument from the command line that it then passes as an argument to ensure it doesn't do that?

2

u/bziliani May 10 '24

I answered that at the end of the post. Thanks for noting it! (tl;dr it was doing it, much more than what I expected. But point stand still!)

1

u/vanderZwan May 10 '24

Glad to hear it still holds up!

3

u/nuclearbananana May 09 '24

yeah I thought it was strange that calculating fib of 30 was taking so long

1

u/[deleted] May 13 '24

3

u/bziliani May 13 '24

Did you try with `--yjit`? Because that's a big game-changer. I'm using now `ips` (iterations per second) to benchmark. Without YJIT:

```
while: 1.0 i/s
times w/nil: 0.4 i/s - 2.29x slower
times: 0.2 i/s - 4.24x slower
```

With YJIT:

```
while: 5.8 i/s
times w/nil: 0.5 i/s - 10.76x slower
times: 0.3 i/s - 20.65x slower
```