Bug 95672 Focus changes slow when java browsing perspective open
To reproduce: 1. Run Eclipse in your favorite profiler 2. Open the Java browsing perspective 3. Profile the time taken to switch between java editors On my system, approx. 50% of the time is spent in JavaBrowsingPart.partBroughtToTop. Notice that this method continues to dominate activation changes, even when another perspective is active and no java browsing parts are visible.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/browsing/JavaBrowsingPart.java
protected boolean hasWorkingSetFilter() {
		return fHasWorkingSetFilter;
	}
	protected void setOpenEditorGroup(OpenEditorActionGroup openEditorGroup) {
		fOpenEditorGroup= openEditorGroup;
	}
	protected OpenEditorActionGroup getOpenEditorGroup() {
		return fOpenEditorGroup;
	}
	protected BuildActionGroup getBuildActionGroup() {
		return fBuildActionGroup;
	}
	protected CCPActionGroup getCCPActionGroup() {
		return fCCPActionGroup;
	}
	private boolean linkBrowsingViewSelectionToEditor() {
		return isLinkingEnabled();
	}
	public void setLinkingEnabled(boolean enabled) {
		fLinkingEnabled= enabled;
		PreferenceConstants.getPreferenceStore().setValue(getLinkToEditorKey(), enabled);
		if (enabled) {
			IEditorPart editor = getSite().getPage().getActiveEditor();
			if (editor != null) {
				setSelectionFromEditor(editor);
			}
		}
	}
}