Hi,
I tried to implement support for parallel ZSTD compression. The
library provides an option (ZSTD_c_nbWorkers) to specify the
number of compression workers. The number of parallel
workers can be set as part of compression parameter and if this
option is specified then the library performs parallel compression
based on the specified number of workers.
User can specify the number of parallel worker as part of
--compress option by appending an integer value after at sign (@).
(-Z, --compress=[{client|server}-]{gzip|lz4|zstd}[:LEVEL][@WORKERS])
Please find the attached patch v1 with the above changes.
Note: ZSTD library version 1.5.x supports parallel compression
by default and if the library version is lower than 1.5.x then
parallel compression is enabled only the source is compiled with build
macro ZSTD_MULTITHREAD. If the linked library version doesn't
support parallel compression then setting the value of parameter
ZSTD_c_nbWorkers to a value other than 0 will be no-op and
returns an error.
Thanks,
Dipesh
