[jira] [Resolved] (IMPALA-9998) Investigate updating zstd version

["Joe McDonnell (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/IMPALA-9998?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Joe McDonnell resolved IMPALA-9998.
-----------------------------------
    Fix Version/s: Impala 4.0
       Resolution: Fixed

> Investigate updating zstd version
> ---------------------------------
>
>                 Key: IMPALA-9998
>                 URL: https://issues.apache.org/jira/browse/IMPALA-9998
>             Project: IMPALA
>          Issue Type: Improvement
>          Components: Backend
>    Affects Versions: Impala 4.0
>            Reporter: Joe McDonnell
>            Priority: Major
>              Labels: native-toolchain
>             Fix For: Impala 4.0
>
>
> Impala currently uses zstd version 1.4.0. It looks like there are some performance improvements in more recent versions:
> {noformat}
> v1.4.5
> perf: Improved decompression speed: x64 : +10% (clang) / +5% (gcc); ARM : from +15% to +50%, depending on SoC, by @terrelln
> perf: Automatically downsizes ZSTD_DCtx when too large for too long (#2069, by @bimbashreshta)
> perf: Improved fast compression speed on aarch64 (#2040, ~+3%, by @caoyzh)
> perf: Small level 1 compression speed gains (depending on compiler)
> v1.4.4
> perf: Improved decompression speed, by > 10%, by @terrelln
> perf: Better compression speed when re-using a context, by @felixhandte
> perf: Fix compression ratio when compressing large files with small dictionary, by @senhuang42
> perf: zstd reference encoder can generate RLE blocks, by @bimbashrestha
> perf: minor generic speed optimization, by @davidbolvansky
> v1.4.1
> perf: Improve decode speed by ~7% @mgrice (#1668)
> perf: Slightly improved compression ratio of level 3 and 4 (ZSTD_dfast) by @cyan4973 (#1681)
> perf: Slightly faster compression speed when re-using a context by @cyan4973 (#1658)
> perf: Improve compression ratio for small windowLog by @cyan4973 (#1624)
> perf: Faster compression speed in high compression mode for repetitive data by @terrelln (#1635){noformat}
> [https://github.com/facebook/zstd/blob/dev/CHANGELOG]
>  



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