Regex benchmarks in Rust, Scala, D and F#

[rsw0x via Digitalmars-d]

On Tuesday, 5 January 2016 at 17:52:39 UTC, Karthikeyan wrote:
> Hi,
>
> Came across this post in rust-lang subreddit about the regex 
> benchamrks. Scala surprisingly outperforms D. LDC also gives a 
> good advantage for efficiency of D.
>
> http://vaskir.blogspot.ru/2015/09/regular-expressions-rust-vs-f.html

k, I optimized it for fun
https://paste.ee/p/Bb1Ns
I also found an mmfile bug if someone could report it for me, if 
I don't add a root to the mmfile contents(or disable the GC) the 
program will crash

ctregex for both
his:
Elapsed: 6432
mine:
Elapsed: 3123

ldc -O3 -release -boundscheck=off -singleobj regex.d
does not compile with the latest gdc on arch linux(no 
lineSplitter)

you could probably get it faster by reusing a buffer(I forget 
which call this is, but it exists in phobos) when reading the 
file but I felt like using mmfile as I've never used it before. 
Make sure you use a block-size buffer(e.g, 4096)

Bye.