5 cents about lz4 alternatives: Broli (mentioned above) is widely supported by web.

https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Accept-Encoding mentions it along with gzip and deflate methods.
I don't recall lz4 or Zstd metioning in this context.

Both Chrome/Chromium and Firefox accepts it by default (didn't check Microsoft products yet).

P.S.
I worked with lz4 python binding a year ago.
It sometimes crashed to core dump when used in multithreaded environment (we used to run compressor/decompresson with asyncio by loop.run_in_executor() call).
I hope the bug is fixed now, have no update for the current state.

On Thu, Nov 29, 2018 at 12:04 PM INADA Naoki <songofacandy@gmail.com> wrote:

On Thu, Nov 29, 2018 at 6:27 AM Steven D'Aprano <steve@pearwood.info> wrote:
>
> On Wed, Nov 28, 2018 at 10:43:04AM -0800, Gregory P. Smith wrote:
>
> > PyPI makes getting more algorithms easy.
>
> Can we please stop over-generalising like this? PyPI makes getting
> more algorithms easy for *SOME* people. (Sorry for shouting, but you
> just pressed one of my buttons.)

I don't think this is over-generalising.

If "get it from PyPI" is not easy enough, why not adding hundreds of
famous libraries?
Because we can't maintain all of them well.

When considering adding new format (not only compression, but also
serialization like toml), I think it should be stable, widely used, and will
be used widely for a long time. If we want to use the format in Python core
or Python stdlib, it's good reasoning too. gzip and json are good example.

When we say "we can use PyPI", it means "are there enough reasons
make the package special enough to add to stdlib?" We don't mean
"everyone can use PyPI."

Regards,
--
INADA Naoki <songofacandy@gmail.com>
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