@@ -0,0 +1,42 @@
+import os
+import timeit
+from textwrap import dedent
+
+"""Multiple isinstance checks."""
+
+setup = """\
+    class A():
+        pass
+
+    data = "asdf"
+"""
+
+tests = {
+    "separate_early": """\
+        isinstance(data, str) or isinstance(data, float) or isinstance(data, A)
+    """,
+    "separate_late": """\
+        isinstance(data, float) or isinstance(data, A) or isinstance(data, str)
+    """,
+    "together_early": """\
+        isinstance(data, (str, float, A))
+    """,
+    "together_late": """\
+        isinstance(data, (float, A, str))
+    """,
+}
+
+results = {}
+for test_name, test_stmt in tests.items():
+    times = timeit.repeat(
+        setup=dedent(setup).rstrip(),
+        stmt=dedent(test_stmt).rstrip(),
+        repeat=1000,
+        number=1000,
+        globals={},
+    )
+    avg_time = sum(times) / len(times)
+    results[test_name] = avg_time
+
+for test_name, result in sorted(results.items(), key=lambda x: x[1]):
+    print(f"{test_name:>18}: {result:03g}")