tiny_jpeg.h
zstd
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| tiny_jpeg.h | zstd | |
|---|---|---|
| 0 | 96 | |
| 224 | 20,277 | |
| - | 2.1% | |
| 0.0 | 9.7 | |
| 9 months ago | 3 days ago | |
| C | C | |
| - | GNU General Public License v3.0 or later |
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tiny_jpeg.h
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Tracking mentions began in Dec 2020.
zstd
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How in the world should we unpack archive.org zst files on Windows?
If you want this functionality in zstd itself, check this out: https://github.com/facebook/zstd/pull/2349
- ZSTD 1.5.5 is released with a corruption fix found at Google
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Float Compression 3: Filters
Interesting to match with the observations from the practice of using ClickHouse[1][2] for time series:
1. Reordering to SOA helps a lot - this is the whole point of column-oriented databases.
2. Specialized codecs like Gorilla[3], DoubleDelta[4], and FPC[5] lose to simply using ZSTD[6] compression in most cases, both in compression ratio and in performance.
3. Specialized time-series DBMS like InfluxDB or TimescaleDB lose to general-purpose relational OLAP DBMS like ClickHouse [7][8][9].
[1] https://clickhouse.com/blog/optimize-clickhouse-codecs-compr...
[2] https://github.com/ClickHouse/ClickHouse
[3] https://clickhouse.com/docs/en/sql-reference/statements/crea...
[4] https://clickhouse.com/docs/en/sql-reference/statements/crea...
[5] https://clickhouse.com/docs/en/sql-reference/statements/crea...
[6] https://github.com/facebook/zstd/
[7] https://arxiv.org/pdf/2204.09795.pdf "SciTS: A Benchmark for Time-Series Databases in Scientific Experiments and Industrial Internet of Things" (2022)
[8] https://gitlab.com/gitlab-org/incubation-engineering/apm/apm... https://gitlab.com/gitlab-org/incubation-engineering/apm/apm...
[9] https://www.sciencedirect.com/science/article/pii/S187705091...
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We're wasting money by only supporting gzip for raw DNA files
zstd has a long range mode, which lets it find redundancies a gigabyte away. Try --long and --long=31 for very long range mode.
zstd has delta / patch mode, which creates a file that stores the "patch" to create a new file from an old (reference) file. See https://github.com/facebook/zstd/wiki/Zstandard-as-a-patchin...
See the man page: https://github.com/facebook/zstd/blob/dev/programs/zstd.1.md
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Decompressing the ZST files on Windows tips
So I downloaded the Facebook tool https://github.com/facebook/zstd
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zstd
They have a nice table on that page: https://github.com/facebook/zstd#benchmarks
Looking at that table, I think LZ4 is a winner. The compression ratio is not too far, compression speed is slightly faster, decompression speed is significantly faster, the code is much simpler so the compiled binary is smaller, and the project is unrelated to Facebook.
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The checklist: Monitoring for Economy
In some cases, zstd can offer up to a 30% reduction in compressed storage as compared to other compression mechanisms. Learn more about zstd here.
What are some alternatives?
Snappy - A fast compressor/decompressor
LZ4 - Extremely Fast Compression algorithm
LZMA - (Unofficial) Git mirror of LZMA SDK releases
7-Zip-zstd - 7-Zip with support for Brotli, Fast-LZMA2, Lizard, LZ4, LZ5 and Zstandard
ZLib - A massively spiffy yet delicately unobtrusive compression library.
brotli - Brotli compression format
LZFSE - LZFSE compression library and command line tool
zlib - Cloudflare fork of zlib with massive performance improvements
haproxy - HAProxy Load Balancer's development branch (mirror of git.haproxy.org)
zlib-ng - zlib replacement with optimizations for "next generation" systems.
zfs - OpenZFS on Linux and FreeBSD
LZHAM - Lossless data compression codec with LZMA-like ratios but 1.5x-8x faster decompression speed, C/C++