GH-1690: compute logical structure for multiple projects in parallel

Author: martinlippert

headless-services/spring-boot-language-server/src/main/java/org/springframework/ide/vscode/boot/java/commands/SpringIndexCommands.java

@@ -75,6 +75,7 @@ public SpringIndexCommands(SimpleLanguageServer server, SpringMetamodelIndex spr
 
 				return projects
 						.sorted(Comparator.comparing(IJavaProject::getElementName))
+						.parallel()
 						.map(project -> nodeFrom(project, cachedIndex, args.updateMetadata,
 								args.selectedGroups == null ? null : args.selectedGroups.get(project.getElementName())))
 						.filter(Objects::nonNull)