Improve parquet gzip compression performance using zlib-rs #7200
+2
−2
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Which issue does this PR close?
Closes #.
Rationale for this change
We will use zlib-rs for delfate operations which has much better performance than the current one. I can see ~10%-47% performance improvement in various scenarios
perf numbers
What changes are included in this PR?
I have updated the flate library to use zlib-rs backend. This does mean that we need to bump our MSRV to 1.75 . So I dont expect the PR to merged immediately until we resolve #181
Also we allow gzip level 10 in our parquet implementation , which is non complaint gzip level as explained here . Hence I have also changed max gzip level to 9.
Are there any user-facing changes?
Yes, max gzip level is now 9 in parquet.