X-Git-Url: https://git.madduck.net/etc/vim.git/blobdiff_plain/c6a031e623c7991ac9129f578dc21dffe2d7ede3..213cb655188fd56c548be3f0d9191c30595407ca:/src/black/cache.py

diff --git a/src/black/cache.py b/src/black/cache.py
index ff15da2..77f66cc 100644
--- a/src/black/cache.py
+++ b/src/black/cache.py
@@ -67,7 +67,8 @@ class Cache:
 
         with cache_file.open("rb") as fobj:
             try:
-                file_data: Dict[str, FileData] = pickle.load(fobj)
+                data: Dict[str, Tuple[float, int, str]] = pickle.load(fobj)
+                file_data = {k: FileData(*v) for k, v in data.items()}
             except (pickle.UnpicklingError, ValueError, IndexError):
                 return cls(mode, cache_file)
 
@@ -129,7 +130,12 @@ class Cache:
             with tempfile.NamedTemporaryFile(
                 dir=str(self.cache_file.parent), delete=False
             ) as f:
-                pickle.dump(self.file_data, f, protocol=4)
+                # We store raw tuples in the cache because pickling NamedTuples
+                # doesn't work with mypyc on Python 3.8, and because it's faster.
+                data: Dict[str, Tuple[float, int, str]] = {
+                    k: (*v,) for k, v in self.file_data.items()
+                }
+                pickle.dump(data, f, protocol=4)
             os.replace(f.name, self.cache_file)
         except OSError:
             pass