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Update to c/image v4.0.1
Update to use the correct c/image/v4 import path, work originally from https://github.com/containers/skopeo/pull/733 by Valentin Rothberg <rothberg@redhat.com>. Signed-off-by: Miloslav Trmač <mitr@redhat.com>
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Miloslav Trmač
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vendor/github.com/klauspost/compress/zstd/README.md
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vendor/github.com/klauspost/compress/zstd/README.md
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@@ -34,7 +34,8 @@ For now, a high speed (fastest) and medium-fast (default) compressor has been im
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The "Fastest" compression ratio is roughly equivalent to zstd level 1.
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The "Default" compression ration is roughly equivalent to zstd level 3 (default).
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In terms of speed, it is typically 2x as fast as the stdlib deflate/gzip in its fastest mode. The compression ratio compared to stdlib is around level 3, but usually 3x as fast.
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In terms of speed, it is typically 2x as fast as the stdlib deflate/gzip in its fastest mode.
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The compression ratio compared to stdlib is around level 3, but usually 3x as fast.
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Compared to cgo zstd, the speed is around level 3 (default), but compression slightly worse, between level 1&2.
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@@ -217,7 +218,8 @@ silesia.tar zstd 3 211947520 66793301 1377 146.79
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As part of the development process a *Snappy* -> *Zstandard* converter was also built.
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This can convert a *framed* [Snappy Stream](https://godoc.org/github.com/golang/snappy#Writer) to a zstd stream. Note that a single block is not framed.
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This can convert a *framed* [Snappy Stream](https://godoc.org/github.com/golang/snappy#Writer) to a zstd stream.
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Note that a single block is not framed.
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Conversion is done by converting the stream directly from Snappy without intermediate full decoding.
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Therefore the compression ratio is much less than what can be done by a full decompression
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