[jbosstools-issues] [JBoss JIRA] (JBIDE-20580) Performance: EL resolvers unnecessarily create a lot of empty ArrayList instances

[Viacheslav Kabanovich (JIRA)]

Viacheslav Kabanovich created JBIDE-20580:
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             Summary: Performance: EL resolvers unnecessarily create a lot of empty ArrayList instances
                 Key: JBIDE-20580
                 URL: https://issues.jboss.org/browse/JBIDE-20580
             Project: Tools (JBoss Tools)
          Issue Type: Task
          Components: cdi, common/jst/core, jsf, seam2
    Affects Versions: 4.3.0.Beta2
            Reporter: Viacheslav Kabanovich
            Assignee: Viacheslav Kabanovich
             Fix For: 4.3.0.CR1


Methods resolveVariables(), resolveELOperand() in all EL resolvers create a new instance of ArrayList, even if it turns out that there is nothing to return. Moreover, in some cases several new instances are created. Such practice creates a great load on memory and performance at full build of a big workspace.

We probably have many other places that unnecessarily create new instances of lists, sets, map and other classes, our code should be revised for it. This issue only covers most often called methods in EL resolvers that really may affect performance.



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