boolean (VirtualDirectoryImpl dir, VirtualFile[] children, List<String> names) { var t = System.nanoTime(); var changed = ReadAction.compute(() -> { VirtualFile[] currentChildren = dir.getChildren(); return !Arrays.equals(children, currentChildren) || !names.equals(getNames(currentChildren)); }); myVfsTime.addAndGet(System.nanoTime() - t); return changed; }