Sunday, September 17, 2006

Compare And Find Best Compression Format

Compression ratio depends on data and algorithm used for compression. Compression speed counts on CPU power and data compression algorithm in used. Some compression utilities such as 7za, gzip, bzip2, etc, come with options to set level of compression. Setting to higher level of compression will means more time taking to compress and decompress too!

Follow the links below to the comparison of various file compression formats. Find the best compression scheme that suit better for a particular application.

  • Lzop official site
  • Rzip official site
  • 7za / 7-Zip / LZMA related article
  • Maximum Compression benchmark
  • Practical compressor test benchmark
  • Ultimate command line compressor benchmark
  • Linux compression tools benchmark. Find the balance between level of compression ratio and time require to complete the compression process.
  • Excerpt from the source:

    lzop is the fastest tool. It finishes about three times faster than gzip but still compresses data almost as much. It finishes about a hundred times faster than lzma and 7za.

    Get even higher compression ratios by combining lzma with tar to increase storage space effectively by 400%.

    The data compression tool with the best trade-off between speed and compression ratio is rzip. With compression level 0, rzip finishes about 400% faster than gzip and compacts data 70% more. Rzip default compression level is another top performer too as it can increase effective disk space by 375% but in only about a fifth of the time lzma can take.

    Rzip accomplishes this feat by using more working memory. Whereas gzip uses only 32KB of working memory during compression, rzip can use up to 900MB! But that's okay since memory is getting cheaper and cheaper.

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