Pzstd Download ##HOT##

PZstandard tries to pick a smart default number of threads if notspecified (displayed in pzstd --help). If this number isnot suitable, during compilation you can definePZSTD_NUM_THREADS to the number of threads you prefer.

pzstd decompresses ~4x as fast as pixz. However, pixz already decompresses at speeds on the order of 100MB/s compressed / 500MB/s uncompressed on my M1 Pro which is the class of hardware you are likely to use if you have access to 1Gb internet.

Pzstd Download

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pzstd needs disproportionately much RAM for decompression. I suspect this is because with the invocation pzstd -d ... > /dev/null, outputs from the various threads need to be bufferend in-memory to write them in order into the output pipe.

However, pzstd does this even when writing outputs to a regular file with -o.

zstd -T# produces a single compact frame, as opposed to pzstd and mcmilk variants which produce multiple independent payloads. Decompressing in parallel multiple independent payloads can be done fairly easily, while untangling dependencies within a single frame is more complex.

The -T option of zstd supports only compression and unfortunately doesn't support decompression. There seemed to be pzstd as an alternative (a-la pigz, lbzip2, etc) that supported both parallel compression and decompression but it seems unmaintained anymore with last actual commit dating 3 years ago. Any ideas?

The miscellaneous compressors (brotli, plzip, lz4 and lzop) didn't stand up to competition. Brotli was very slow and still larger than *bzip2. The two fast algorithms (lz4, lzop) lose to pzstd. Plzip comes close but is worse than pixz. Zpaq excelled in some other benchmarks, but that doesn't happen on default settings and I dislike the non-standard command-line usage anyway.

If you want to be as fast as possible, use pzstd, its performance is just amazing. It reaches near-gzip compression levels in a ridiculously short amount of time. I'll definitely try to remember that.

My setup: 1 Gbps network, Clonezilla SE in virtual machine on pretty old server, and fast client PC with Core i5 processor. Clean Windows 7 with browser, totalling 20GB, was used for cloning purpuses.

For me parallel zstd (pzstd) is definetly a winner: it shows best save and restore times and pretty decent compress ratio, and also it's very CPU efficient, so it won't be slow on older PCs and saves your power bill.

I really think that pzstd must be default compression tool in Clonezilla. And may be instead of algorith give abiltiy to user to choose zstd compression level. e24fc04721