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  1. JDK
  2. JDK-6887978

compilation very slow for classes with many fields

    Details

    • Type: Bug
    • Status: Closed
    • Priority: P4
    • Resolution: Duplicate
    • Affects Version/s: 7
    • Fix Version/s: 7
    • Component/s: tools
    • Labels:
    • Subcomponent:
    • CPU:
      generic
    • OS:
      generic

      Description

      test/gc/test/gc/6845368/bigobj.java in the hotspot repo includes a class with close to 64K fields. javac takes several minutes to compile this file on slower machines. Sample output from collect/er_print:

      Functions sorted by metric: Exclusive User CPU Time

      Excl. User CPU Incl. User CPU Name
                                             
         sec. % sec. %
      166.506 100.00 166.506 100.00 <Total>
       94.656 56.85 95.837 57.56 com.sun.tools.javac.code.Scope.lookup(com.sun.tools.javac.util.Name)
       57.200 34.35 57.200 34.35 com.sun.tools.javac.code.Scope$Entry.next()
        5.794 3.48 5.794 3.48 <JVM-System>
        1.181 0.71 1.181 0.71 com.sun.tools.javac.code.Scope$Entry.access$000(com.sun.tools.javac.code.Scope$Entry)
        0.220 0.13 0.220 0.13 <Unknown>
        0.200 0.12 112.809 67.75 com.sun.tools.javac.comp.Check.checkConflicts(com.sun.tools.javac.util.JCDiagnostic$DiagnosticPosition, com.sun.tools.javac.code.Symbol, com.sun.tools.javac.code.Symbol$TypeSymbol)
        0.180 0.11 0.440 0.26 com.sun.tools.javac.parser.Scanner.scanIdent()
        0.170 0.10 0.170 0.10 com.sun.tools.javac.util.List.nonEmpty()
        0.160 0.10 41.099 24.68 com.sun.tools.javac.comp.MemberEnter.visitVarDef(com.sun.tools.javac.tree.JCTree$JCVariableDecl)

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              • Assignee:
                jjg Jonathan Gibbons
                Reporter:
                jcoomes John Coomes
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                • Created:
                  Updated:
                  Resolved:
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