Make test less expensive

Author: neonene

Lib/test/datetimetester.py

@@ -7295,22 +7295,27 @@ def test_update_type_cache(self):
             """)
         script_helper.assert_python_ok('-c', script)
 
-    @support.skip_if_pgo_task
     @unittest.skipIf(_interpreters is None, "missing _interpreters module")
     def test_static_type_concurrent_init_fini(self):
         # gh-136421
         script = textwrap.dedent("""
-            from concurrent.futures import InterpreterPoolExecutor
-            def func():
-                import _datetime
-                print('a', end='')
-            with InterpreterPoolExecutor(max_workers=10) as executor:
-                for _ in range(10):
-                    executor.submit(func)
-        """)
-        res = script_helper.assert_python_ok("-c", script)
-        self.assertEqual(res.out, b'a' * 10)
-        self.assertEqual(res.err, b'')
+            import threading
+            import _interpreters
+
+            def run(id):
+                _interpreters.exec(id, "import _datetime; print('a', end='')")
+                _interpreters.destroy(id)
+
+            ids = [_interpreters.create() for i in range(10)]
+            ts = [threading.Thread(target=run, args=(id,)) for id in ids]
+            for t in ts:
+                t.start()
+            for t in ts:
+                t.join()
+            """)
+        _, out, err = script_helper.assert_python_ok('-c', script)
+        self.assertEqual(out, b'a' * 10)
+        self.assertEqual(err, b'')
 
 
 def load_tests(loader, standard_tests, pattern):