Use larger block sizes when extracting files from archives.

diffoscope/comparators/utils/libarchive.py

@@ -320,7 +320,7 @@ class LibarchiveContainer(Archive):
                 os.makedirs(os.path.dirname(dst), exist_ok=True)
                 try:
                     with open(dst, "wb") as f:
-                        for block in entry.get_blocks():
+                        for block in entry.get_blocks(block_size=2 ** 17):
                             f.write(block)
                 except Exception as e:
                     raise ContainerExtractionError(entry.pathname, e)