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docs: address issue #23757 #24112

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2 changes: 2 additions & 0 deletions _vale/config/vocabularies/Docker/accept.txt
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Original file line number Diff line number Diff line change
@@ -1,5 +1,7 @@
(?i)[A-Z]{2,}'?s
jq
zstd
Zstandard
untracked
ripgrep
exfiltration
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16 changes: 16 additions & 0 deletions content/manuals/build/exporters/_index.md
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Expand Up @@ -252,6 +252,22 @@ the previous compression algorithm.
> The `gzip` and `estargz` compression methods use the [`compress/gzip` package](https://pkg.go.dev/compress/gzip),
> while `zstd` uses the [`github.com/klauspost/compress/zstd` package](https://github.com/klauspost/compress/tree/master/zstd).

#### zstd compression levels

When you specify `compression=zstd`, the `compression-level` parameter accepts
values from 0 to 22. BuildKit maps these values to four internal compression
levels:

| compression-level | Internal level | Approximate zstd level | Description |
| ----------------- | -------------- | ---------------------- | ------------------------------------- |
| 0-2 | Fastest | ~1 | Fastest compression, larger file size |
| 3-6 (default) | Default | ~3 | Balanced compression and speed |
| 7-8 | Better | ~7 | Better compression, slower |
| 9-22 | Best | ~11 | Best compression, slowest |

For example, setting `compression-level=5` and `compression-level=6` produces
the same compression output, since both map to the "Default" internal level.

### OCI media types

The `image`, `registry`, `oci` and `docker` exporters create container images.
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