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Fix docs: Snappy compressor works in 64 kB blocks instead of 32 kB now

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Hsiao-Wei Wang 2020-10-13 17:58:17 +08:00
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format_description.txt
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@ -1,5 +1,5 @@
Snappy compressed format description Snappy compressed format description
Last revised: 2011-10-05 Last revised: 2020-10-13
This is not a formal specification, but should suffice to explain most This is not a formal specification, but should suffice to explain most
@ -76,9 +76,9 @@ yielding a form of run-length encoding (RLE). For instance,
<literal: "xab"> <copy: offset=2 length=4> <literal: "xab"> <copy: offset=2 length=4>
Note that since the current Snappy compressor works in 32 kB Note that since the current Snappy compressor works in 64 kB
blocks and does not do matching across blocks, it will never produce blocks and does not do matching across blocks, it will never produce
a bitstream with offsets larger than about 32768. However, the a bitstream with offsets larger than about 65536. However, the
decompressor should not rely on this, as it may change in the future. decompressor should not rely on this, as it may change in the future.
There are several different kinds of copy elements, depending on There are several different kinds of copy elements, depending on