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https://issues.apache.org/jira/browse/MNG-5729?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Guillaume Nodet reassigned MNG-5729:
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Assignee: Guillaume Nodet
> Measure (build time) durations with System.nanoTime only
> --------------------------------------------------------
>
> Key: MNG-5729
> URL: https://issues.apache.org/jira/browse/MNG-5729
> Project: Maven
> Issue Type: Improvement
> Components: Embedding, General, Logging, Performance, Reactor and
> Workspace
> Affects Versions: 3.2.3
> Reporter: Michael Osipov
> Assignee: Guillaume Nodet
> Priority: Major
> Fix For: 4.1.0
>
>
> Currently, we solely rely on {{System.currentTimeMillis}} to track start/end
> times as well as durations. This is error prone and not guaranteed to deliver
> a monotic value with positive durations.
> We should consider employing {{System.nanoTime}} throughout the core where
> the above mentioned conditions are met. E.g., in some of:
> {noformat}
> maven-aether-provider/src/test/java/org/apache/maven/repository/internal/util/ConsoleTransferListener.java:
> long duration = System.currentTimeMillis() - resource.getTransferStartTime();
> maven-compat/src/main/java/org/apache/maven/repository/legacy/MavenArtifact.java:
> this.transferStartTime = System.currentTimeMillis();
> maven-core/src/main/java/org/apache/maven/lifecycle/internal/builder/BuilderCommon.java:
> long buildEndTime = System.currentTimeMillis();
> maven-core/src/main/java/org/apache/maven/lifecycle/internal/LifecycleModuleBuilder.java:
> long buildStartTime = System.currentTimeMillis();
> maven-core/src/main/java/org/apache/maven/lifecycle/internal/LifecycleModuleBuilder.java:
> long buildEndTime = System.currentTimeMillis();
> maven-embedder/src/main/java/org/apache/maven/cli/event/ExecutionEventLogger.java:
> long finish = System.currentTimeMillis();
> maven-embedder/src/main/java/org/apache/maven/cli/transfer/AbstractMavenTransferListener.java:
> long duration = System.currentTimeMillis() - resource.getTransferStartTime();
> maven-embedder/src/main/java/org/apache/maven/cli/transfer/Slf4jMavenTransferListener.java:
> long duration = System.currentTimeMillis() - resource.getTransferStartTime();
> DefaultMaven.java: request.setStartTime( new Date() );
> DefaultMavenExecutionRequest.java: public Date getStartTime()
> DefaultMavenExecutionRequest.java: projectBuildingRequest.setBuildStartTime(
> getStartTime() );
> MavenExecutionRequest.java: Date getStartTime();
> MavenSession.java: public Date getStartTime()
> MavenSession.java: return request.getStartTime();
> ExecutionEventLogger.java: long time = finish -
> session.getRequest().getStartTime().getTime();
> {noformat}
> and all other code spots where {{Date}} or {{long}} is used.
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