• Eager Eagle
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    41 year ago

    as in time wasted transferring a highly compressible file that you didn’t bother compressing first?

    it’s only a waste of time when the file format is already compressed.

    • @[email protected]
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      fedilink
      -11 year ago

      Unless you measure your baud in dial up modem, it often can take longer to compress / transport / uncompress than just transfer directly.

      • Eager Eagle
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        51 year ago

        unless you’re picking a slow compressor that’s not true at all

        Original size | 100 GB
        Compressed size | 47.8 GB (2.091 ratio)
        Transfer speed | 1 Gbps (125 MB/s)
        Original transfer time | 100 GB / 125 MB/s = 800 seconds
        Compressed transfer time | 47.8 GB / 125 MB/s = 382.4 seconds
        
        Compressor | Snappy
        Compression ratio | 2.091 ratio
        Compression speed | 565 MB/s
        Decompression speed | 1950 MB/s
        Compression time | 100 GB / 565 MB/s = 177 seconds
        Decompression time | 47.8 GB / 1950 MB/s = 24.5 seconds
        
        Transfer time w/o compression | 800 seconds
        Transfer time with compression | 177 + 382.4 + 24.5 = 584.9 seconds