On Wed, Aug 17, 2022 at 1:03 PM Ard Biesheuvel <ardb@xxxxxxxxxx> wrote:
> BZIP2 has been omitted from the set of supported compression algorithms,
> given that its performance is mediocre both in speed and size, and it
> uses a disproportionate amount of memory. For optimal compression, use
> LZMA. For the fastest boot speed, use LZO.
...
> +config EFI_ZBOOT
> + bool "Enable the generic EFI decompressor"
> + depends on EFI_GENERIC_STUB && !ARM
> + select HAVE_KERNEL_GZIP
> + select HAVE_KERNEL_LZ4
> + select HAVE_KERNEL_LZMA
> + select HAVE_KERNEL_LZO
I hope I don't turn this into a bike-shed discussion, but it feels
like if you give
the choice between these four, you should also offer ZSTD, which combines
high compression ratio with fast decompression speed.
XZ is probably more widely installed than LZMA.
I would be happy with just gzip (to minimize build dependencies) and
zstd, but there is little harm in also including the other ones you have
here, or all seven of them.
Arnd
