refactor: use crc32 instead of sha1 to compute hash

To compute a hash to identify container across runs use crc32 instead of
sha1 which is faster while still being fit-for-purpose.

Author: matthiasschaub

core/testcontainers/core/container.py

@@ -1,7 +1,8 @@
 import contextlib
-import hashlib
 import logging
+import pickle
 import sys
+import zlib
 from os import PathLike
 from socket import socket
 from types import TracebackType
@@ -217,7 +218,7 @@ def start(self) -> Self:
                 self.volumes,
                 str(tuple(sorted(self._kwargs.values()))),
             ]
-            hash_ = hashlib.sha256(bytes(str(args), encoding="utf-8")).hexdigest()
+            hash_ = str(zlib.crc32(pickle.dumps(args)))
             docker_client = self.get_docker_client()
             container = docker_client.find_container_by_hash(hash_)
             if container is not None:

core/tests/test_reusable_containers.py

@@ -114,7 +114,7 @@ def test_docker_container_labels_hash_default():
 def test_docker_container_labels_hash(monkeypatch):
     tc_properties_mock = testcontainers_config.tc_properties | {"testcontainers.reuse.enable": "true"}
     monkeypatch.setattr(testcontainers_config, "tc_properties", tc_properties_mock)
-    expected_hash = "1bade17a9d8236ba71ffbb676f2ece3fb419ea0e6adb5f82b5a026213c431d8e"
+    expected_hash = "1296172062"
     with DockerContainer("hello-world").with_reuse() as container:
         assert container._container is not None
         assert container._container.labels["hash"] == expected_hash