Check file amount when calculating worker count

djlint/__init__.py

@@ -381,7 +381,7 @@ def main(
             echo()
 
         progress_char = " »" if sys.platform == "win32" else "┈━"
-        worker_count = min(os.cpu_count() or 1, 4)
+        worker_count = min(os.cpu_count() or 1, len(file_list), 4)
         executor_cls = (
             ProcessPoolExecutor if worker_count > 1 else ThreadPoolExecutor
         )