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https://issues.apache.org/jira/browse/HBASE-26259?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17419515#comment-17419515
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Andrew Kyle Purtell commented on HBASE-26259:
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I spent some time today optimizing the LZMA codec. Yes, it is a super slow
compressor (by design), but actually decompression can be faster than both gzip
and bzip2, if the implementation is not too inefficient... XZ for Java has an
option where you can implement a cache for byte and int arrays to speed things
up, and so I did that, also optimizing the zeroing of those arrays with Unsafe.
The pure Java decompressor is now faster than our native Hadoop codec, for what
it's worth.
> Fallback support to pure Java compression
> -----------------------------------------
>
> Key: HBASE-26259
> URL: https://issues.apache.org/jira/browse/HBASE-26259
> Project: HBase
> Issue Type: Sub-task
> Reporter: Andrew Kyle Purtell
> Assignee: Andrew Kyle Purtell
> Priority: Major
> Fix For: 2.5.0, 3.0.0-alpha-2
>
> Attachments: BenchmarkCodec.java, BenchmarksMain.java,
> RandomDistribution.java, ac_lz4_results.pdf, ac_snappy_results.pdf,
> ac_zstd_results.pdf, lz4_lz4-java_result.pdf, xerial_snappy_results.pdf
>
>
> Airlift’s aircompressor
> (https://search.maven.org/artifact/io.airlift/aircompressor) is an Apache 2
> licensed library, for Java 8 and up, available in Maven central, which
> provides pure Java implementations of gzip, lz4, lzo, snappy, and zstd and
> Hadoop compression codecs for same, claiming “_they are typically 300% faster
> than the JNI wrappers_.” (https://github.com/airlift/aircompressor). This
> library is under active development and up to date releases because it is
> used by Trino.
> Proposed changes:
> * Modify Compression.java such that compression codec implementation classes
> can be specified by configuration. Currently they are hardcoded as strings.
> * Pull in aircompressor as a ‘compile’ time dependency so it will be bundled
> into our build and made available on the server classpath.
> * Modify Compression.java to fall back to an aircompressor pure Java
> implementation if schema specifies a compression algorithm, a Hadoop native
> codec was specified as desired implementation, but the requisite native
> support is somehow not available.
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