Don't use trailrunner to format exactly one file

See facebook#159
Bobronium · May 17, 2022 · b30aba2 · b30aba2
1 parent 63839ac
commit b30aba2
Showing 1 changed file with 4 additions and 1 deletion.
diff --git a/usort/api.py b/usort/api.py
@@ -131,7 +131,10 @@ def usort_path(path: Path, *, write: bool = False) -> Iterable[Result]:
             paths = list(walk(path, excludes=config.excludes))
 
         fn = partial(usort_file, write=write)
-        results = [v for v in run(paths, fn).values()]
+        if len(paths) == 1:  
+            results = [fn(paths[0])]  # shave off multiprocessing overhead
+        else:
+            results = [v for v in run(paths, fn).values()]
         return results