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
DataTransferMessages.WizardProjectsImportPage_CheckingMessage,
				directory.getPath()));
		File[] contents = directory.listFiles();
		
		final String dotProject = IProjectDescription.DESCRIPTION_FILE_NAME;
		for (int i = 0; i < contents.length; i++) {
			File file = contents[i];
			if (file.isFile() && file.getName().equals(dotProject)) {
				files.add(file);
				
				
				return true;
			}
		}
		
		for (int i = 0; i < contents.length; i++) {
			if (contents[i].isDirectory()) {
				if (!contents[i].getName().equals(METADATA_FOLDER)) {
					collectProjectFilesFromDirectory(files, contents[i],
							monitor);
				}
			}
		}
		return true;
	}
	/**
	 * Collect the list of .project files that are under directory into files.
	 * 
	 * @param files
	 * @param monitor