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https://issues.apache.org/jira/browse/ACCUMULO-4621?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Michael Miller resolved ACCUMULO-4621.
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Resolution: Duplicate
Fix Version/s: (was: 2.0.0)
> Refactor hot methods for JIT optimization
> -----------------------------------------
>
> Key: ACCUMULO-4621
> URL: https://issues.apache.org/jira/browse/ACCUMULO-4621
> Project: Accumulo
> Issue Type: Improvement
> Components: client, fate, tserver
> Reporter: Michael Miller
> Priority: Major
>
> I did some analysis of how well the JIT compiler optimizes Accumulo code by
> running tests locally in JMH and against a single local instance of Uno. To
> print what the JIT compiler was doing, I used the following java options:
> {code}
> -XX:+PrintCompilation
> -XX:+UnlockDiagnosticVMOptions
> -XX:+PrintInlining
> {code}
> Then I would grep the output for "accumulo" and "hot method too big". Here
> is the list of methods I compiled from the tests I did on both client and
> server.:
> {code}
> org.apache.accumulo.core.client.impl.TabletLocatorImpl::processInvalidated
> org.apache.accumulo.core.client.impl.ThriftScanner::scan
> org.apache.accumulo.core.data.Key::equals
> org.apache.accumulo.core.data.thrift.TMutation$TMutationStandardScheme::read
> org.apache.accumulo.core.file.rfile.RFile$LocalityGroupReader::_seek
> org.apache.accumulo.core.file.rfile.RelativeKey::<init>
> org.apache.accumulo.core.file.rfile.RelativeKey::readFields
> org.apache.accumulo.core.security.ColumnVisibility$ColumnVisibilityParser::parse_
> org.apache.accumulo.fate.zookeeper.ZooCache$2::run
> org.apache.accumulo.server.constraints.MetadataConstraints::check
> org.apache.accumulo.server.master.LiveTServerSet::checkServer
> org.apache.accumulo.tserver.FileManager::reserveReaders
> org.apache.accumulo.tserver.constraints.ConstraintChecker::check
> org.apache.accumulo.tserver.scan.NextBatchTask::run
> org.apache.accumulo.tserver.tablet.ScanDataSource::createIterator
> org.apache.accumulo.tserver.tablet.Scanner::read
> {code}
> This work was inspired by this blog post:
> https://techblug.wordpress.com/2013/08/19/java-jit-compiler-inlining/
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