PoC: Add API to allow to use zstd prepared dictionary #8128
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Dandandan
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Which issue does this PR close?
Just some experiment to show using zstd prepared dictionaries for improving compression ratio and speed.
Rationale for this change
Why are you proposing this change? If this is already explained clearly in the issue then this section is not needed.
Explaining clearly why changes are proposed helps reviewers understand your changes and offer better suggestions for fixes.
What changes are included in this PR?
There is no need to duplicate the description in the issue here but it is sometimes worth providing a summary of the individual changes in this PR.
Are these changes tested?
We typically require tests for all PRs in order to:
If tests are not included in your PR, please explain why (for example, are they covered by existing tests)?
Are there any user-facing changes?
If there are user-facing changes then we may require documentation to be updated before approving the PR.
If there are any breaking changes to public APIs, please call them out.