I've made an AMB edition of my latest book, Overscan: Stories From Beyond
the Screen's Edge. I incorporated MVCOMP into my workflow to make a new
version, which you can find on Mateusz's site: http://mateusz.fr/amb/
MVCOMP cut down the size of the AMB edition from 66K to 38K.
Overscan is an anthology of fantasy and science fiction from writers who
use my Nantucket Lit platform. I thought it would be ideal for AMB since it's
text-only, and a relatively short book.
Here's the bash script I use to make my AMB files, including the MVCOMP
compression:
https://codeberg.org/nantucketlit/nantucketlit/src/branch/main/buildamb.sh
Nicholas Bernhard
On Thu, Aug 28, 2025 at 10:19:00AM +0200, Mateusz Viste via Freedos-user wrote:
> On 8/28/25 03:41, Louis Santillan wrote:
> > Additionally, jart from cosmopolitan libc/APE has a short C
> > implementation (though somewhat awkwardly organized, IMO) of LZ4.
>
> LZ4 is (slightly) more complex than MVCOMP, and not as efficient in the use
> case at hand. FreeDOS HELP (EN, AMB) size:
>
> Uncompressed = 862 KiB
>
> DEFLATE = 380 KiB
> MVCOMP = 462 KiB
> LZ4 -9 = 490 KiB
>
> I did not bother with benchmarks, but I doubt LZ4's decompression speed to
> be noticeably better than MVCOMP. Both are of comparable complexity, with
> one or two extra steps for LZ4.
>
> The LZ4 implementation shines when it comes to compression speed, though. My
> current MVCOMP compression implementation is *very* slow. I did not look to
> optimize it as I created MVCOMP primarily to compress assets that are
> embedded in executable (like NLS strings), the compressor performances does
> not matter in this use case.
>
> My goal was to achieve a maximum compression ratio with a decoder as tiny
> and stupidly simple as reasonably possible.
>
> Mateusz
>
>
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