[jira] [Updated] (CASSANDRA-8151) Add build support for JMH microbenchmarks

["T Jake Luciani (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/CASSANDRA-8151?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

T Jake Luciani updated CASSANDRA-8151:
--------------------------------------
    Component/s: Testing

> Add build support for JMH microbenchmarks
> -----------------------------------------
>
>                 Key: CASSANDRA-8151
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-8151
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Testing
>            Reporter: T Jake Luciani
>            Assignee: T Jake Luciani
>            Priority: Minor
>             Fix For: 2.2.0 beta 1
>
>         Attachments: 8185.txt
>
>
> Making performance changes to C* often requires verification by stress or cstar.datastax.com.  Other changes can be verified with a microbenchmark tool like JMH.  As a developer, maintaining a separate project to run these is a pain.
> This patch adds support to run microbenchmarks as a separate ant target.  Also adds a sample showing some of the benchmark annotation options.
> {code}
> ant microbench -Dbenchmark.name=Sample
> ...
>      [java] Benchmark                  (duplicateLookback)  (pageSize)  (randomRatio)  (randomRunLength)  (uniquePages)   Mode  Samples   Score   Error   Units
>      [java] o.a.c.t.m.Sample.lz4                    4..128       65536            0.1              4..16           1024  thrpt        5  27.215 ± 0.717  ops/ms
>      [java] o.a.c.t.m.Sample.snappy                 4..128       65536            0.1              4..16           1024  thrpt        5  15.306 ± 0.779  ops/ms
> {code}
> If you skip the benchmark.name property it will run all microbenchmarks (under the microbenchmark package namespace)
> One annoying thing about this patch is it now adds this error on build which is an annoying but harmless warning
> {code}
> [javac] warning: Supported source version 'RELEASE_6' from annotation processor 'org.openjdk.jmh.generators.BenchmarkProcessor' less than -source '1.7'
> {code}
> https://bugs.openjdk.java.net/browse/JDK-8037955



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