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  1. JDK
  2. JDK-4254022

PERF: GridBagLayout inefficiency

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    • b24
    • generic, x86, sparc
    • generic, linux, solaris_2.5.1, solaris_2.6, solaris_7, windows_nt

      Name: rlT66838 Date: 07/14/99


      We have profiled our Java program and one of
      the places it is spending the most time is in
      GridBagLayout allocating new arrays. For example:

        GridBagLayoutInfo () {
          minWidth = new int[GridBagLayout.MAXGRIDSIZE];
          minHeight = new int[GridBagLayout.MAXGRIDSIZE];
          weightX = new double[GridBagLayout.MAXGRIDSIZE];
          weightY = new double[GridBagLayout.MAXGRIDSIZE];
        }

      This method is called many times. It allocates
      arrays of MAXGRIDSIZE (512) ints and doubles.
      Also there are other allocations of arrays of
      [MAXGRIDSIZE] elements. MAXGRIDSIZE is a static final
      int so a class can't even extend GridBagLayout and
      change its value.

      How about adding setMaxGridSize() to GridBagLayout,
      or a new constructor GridBagLayout(int maxGridSize)?
      (Review ID: 85571)
      ======================================================================

            dav Andrei Dmitriev (Inactive)
            rlewis Roger Lewis (Inactive)
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