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
* @see org.eclipse.swt.events.SelectionListener#widgetSelected(org.eclipse.swt.events.SelectionEvent)
			 */
			public void widgetSelected(SelectionEvent e) {
				directoryRadioSelected();
			}
		});
		projectFromArchiveRadio.addSelectionListener(new SelectionAdapter() {
			/*
			 * (non-Javadoc)
			 * 
			 * @see org.eclipse.swt.events.SelectionListener#widgetSelected(org.eclipse.swt.events.SelectionEvent)
			 */
			public void widgetSelected(SelectionEvent e) {
				archiveRadioSelected();
			}
		});
	}
	private void archiveRadioSelected() {
		if (projectFromArchiveRadio.getSelection()) {
			directoryPathField.setEnabled(false);
			browseDirectoriesButton.setEnabled(false);
			archivePathField.setEnabled(true);
			browseArchivesButton.setEnabled(true);
			updateProjectsList(archivePathField.getText());
			archivePathField.setFocus();
			copyCheckbox.setSelection(true);
			copyCheckbox.setEnabled(false);
		}
	}
	private void directoryRadioSelected() {