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
if (projectFromDirectoryRadio.getSelection()) {
			directoryPathField.setEnabled(true);
			browseDirectoriesButton.setEnabled(true);
			archivePathField.setEnabled(false);
			browseArchivesButton.setEnabled(false);
			updateProjectsList(directoryPathField.getText());
			directoryPathField.setFocus();
			copyCheckbox.setEnabled(true);
			copyCheckbox.setSelection(copyFiles);
		}
	}
	/*
	 * (non-Javadoc) Method declared on IDialogPage. Set the focus on path
	 * fields when page becomes visible.
	 */
	public void setVisible(boolean visible) {
		super.setVisible(visible);
		if (visible && this.projectFromDirectoryRadio.getSelection()) {
			this.directoryPathField.setFocus();
		}
		if (visible && this.projectFromArchiveRadio.getSelection()) {
			this.archivePathField.setFocus();
		}
	}
	/**
	 * Update the list of projects based on path. Method declared public only
	 * for test suite.
	 * 
	 * @param path
	 */