[ 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] > -- This message was sent by Atlassian Jira (v8.3.4#803005)