Bug 152919 [Import/Export] import existing project w/ copy is inefficient
I just tried to import some existing projects and selected "copy projects into workspace". After a long time (sorry, no measurements) I had to cancel the request, because I was running out of disk space. I had just succeeded in importing the first project (jdt core), which takes approx. 80MB disk space, but at that time the previously blank workspace consumed additional 300MB mainly in: .metadata/.plugins/org.eclipse.core.resources/.history/ Is this operation recording undo-information for each single file imported? Unless I made something really stupid, this operation seems not to be usable for large projects.
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/wizards/datatransfer/WizardProjectsImportPage.java
*/
			public Object[] getChildren(Object parentElement) {
				return null;
			}
			/*
			 * (non-Javadoc)
			 * 
			 * @see org.eclipse.jface.viewers.IStructuredContentProvider#getElements(java.lang.Object)
			 */
			public Object[] getElements(Object inputElement) {
				return getValidProjects();
			}
			/*
			 * (non-Javadoc)
			 * 
			 * @see org.eclipse.jface.viewers.ITreeContentProvider#hasChildren(java.lang.Object)
			 */
			public boolean hasChildren(Object element) {
				return false;
			}
			/*
			 * (non-Javadoc)
			 * 
			 * @see org.eclipse.jface.viewers.ITreeContentProvider#getParent(java.lang.Object)
			 */
			public Object getParent(Object element) {
				return null;
			}
			/*
			 * (non-Javadoc)