to reduce confusion with the term "block".
-B# remains supported for existing scripts,
but it's no longer documented, so it's effectively a hidden shortcut.
to reduce confusion with the concept of "blocks" inside a Zstandard frame.
We are now talking about "independent chunks" being produced by a `split` operation.
updated documentation accordingly.
Note: old commands "-B#` and `--blocksize=#` remain supported,
to maintain compatibility with existing scripts.
the purpose of --ultra is to make the user explicitly opt-in
to generate very large window size (> 8 MB).
The agreement to generate very large window size is already implicit
when selecting --long or --patch-from.
Consequently, `--ultra ` is automatically enabled when `--long` or `--patch-from` is set.
* Change CLI to employ multithreading by default
* Document changes to benchmarking, print number of threads for display level >= 4, and add lower bound of 1 for the default number of threads
update the man page in troff format,
and the README with latest `--help` content and complementary details about benchmark mode.
also: display level 0 when doing decompression benchmark
After a regrettable update,
the benchmark module ended up reloading sources for every compression level.
While the delay itself is likely torelable,
the main issue is that the `--quiet` mode now also displays a loading summary between each compression line.
This wasn't the original intention, which is to produce a compact view of all compressions.
This is fixed in this version,
where sources are loaded only once, for all compression levels,
and loading summary is only displayed once.
only disable `--rm` at end of command line parsing,
so that `-c` only disables `--rm` if it's effectively selected,
and not if it's overriden by a later `-o FILE` command.
this generator replaces the statistical generator
for the general case when no statistic is requested.
Generated data features a compression level speed / ratio curve
which is more in line with expectation.
