# xdu

Just a tool that implements 'du -s' behavior using [OpenMP](https://www.openmp.org).
This conforms to [IEEE Std POSIX 1003.1-2024](https://publications.opengroup.org/standards/unix/c243) rather
than any specific OS, or distribution behaviors.  This shouldn't impact much as most implementations
I know of generally conform to POSIX.

## Building

Just a standard meson [meson](https://mesonbuild.com) project.

``` shell
meson setup build
meson compile -C build
```

## *Very* anecdotal performance findings

I just ran this, and diskus in my home directory and measured with time.
I did it numerous times.  Here are just the last results I got.

``` shell
diskus 2.67s user 85.20s system 683% cpu 12.857 total
xdu 23.47s user 46.78s system 878% cpu 7.998 total
```

So around about a 40% improvement give or take on each run.  I'm not
really looking to run an entire benchmark on du implementations here I
just wanted to see how OpenMP would perform, and it performs pretty
well.

There are further improvement possibilities with batching tasks and
such, but I'll leave that in case I get some crazy idea into making this
a full du implementation.