Bug 110728 Heap Status needs a preference to turn it off.
Run Eclipse 3.2M2 under OS X 10.4.x. After the initial transient high CPU usage normally seen during Ecllpse start up the CPU usage goes to ~4% at "idle" during routine Java development. After several tens of minutes of normal use the CPU usage climbs to anywhere between 20% to >40% when idling. Quitting and restarting Eclipse 3.2M2 restores the idle CPU usage to ~4%, but it continues to climb with use.
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/ide/dialogs/IDEWorkbenchPreferencePage.java
/*******************************************************************************
 * Copyright (c) 2000, 2005 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.ui.internal.ide.dialogs;
import org.eclipse.jface.preference.IPreferenceStore;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.ui.IWorkbenchPreferencePage;
import org.eclipse.ui.PlatformUI;
import org.eclipse.ui.internal.IWorkbenchHelpContextIds;
import org.eclipse.ui.internal.dialogs.WorkbenchPreferencePage;
import org.eclipse.ui.internal.ide.IDEWorkbenchPlugin;
/**
 * The IDE workbench main preference page.
 * 
 *Note: want IDE settings to appear in main Workbench preference page (via subclassing),
 *   however the superclass, WorkbenchPreferencePage, is internal
 */
public class IDEWorkbenchPreferencePage extends WorkbenchPreferencePage