JDK-6436314 : Vector could be created with appropriate size in DefaultComboBoxModel
- Type: Bug
- Component: client-libs
- Sub-Component: javax.swing
- Affected Version: 6,7,8
- Priority: P4
- Status: Resolved
- Resolution: Fixed
- OS: generic
- CPU: generic
- Submitted: 2006-06-08
- Updated: 2014-10-10
- Resolved: 2013-05-31
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| JDK 7 | JDK 8 |
|---|---|
7u40Fixed  |
8 b94Fixed |
Description
src/share/classes/javax/swing/DefaultComboBoxModel.java:51: public DefaultComboBoxModel(final Object items[]) {
src/share/classes/javax/swing/DefaultComboBoxModel.java:52: objects = new Vector();
src/share/classes/javax/swing/DefaultComboBoxModel.java:53: objects.ensureCapacity( items.length );
creates a default-sized Vector and then resizes it. That probably drops the default-sized backing array on the floor and allocates a new one. It would be more efficient to create the Vector with the appropriate size. I don't know what the average size of the items array is to the DefaultComboBoxModel constructor. If that array is typically small, then maybe this isn't a problem.
Comments
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