Move is_slow_machine to test_support

Author: stefanor

Lib/test/support/__init__.py

@@ -16,6 +16,7 @@
 import sysconfig
 import textwrap
 import time
+import timeit
 import types
 import unittest
 import warnings
@@ -2694,6 +2695,9 @@ def exceeds_recursion_limit():
     return 150_000
 
 
+# Is the host running the tests significantly slower than a typical PC?
+is_slow_machine = timeit.timeit("2*2", number=10_000) > 0.0001
+
 # Windows doesn't have os.uname() but it doesn't support s390x.
 is_s390x = hasattr(os, 'uname') and os.uname().machine == 's390x'
 skip_on_s390x = unittest.skipIf(is_s390x, 'skipped on s390x')

Lib/test/test_profiling/test_sampling_profiler.py

@@ -10,7 +10,6 @@
 import subprocess
 import sys
 import tempfile
-import timeit
 import unittest
 from collections import namedtuple
 from unittest import mock
@@ -26,12 +25,10 @@
 from test.support import force_not_colorized_test_class, SHORT_TIMEOUT
 from test.support.socket_helper import find_unused_port
 from test.support import requires_subprocess, is_emscripten
-from test.support import captured_stdout, captured_stderr
+from test.support import captured_stdout, captured_stderr, is_slow_machine
 
 PROCESS_VM_READV_SUPPORTED = False
 
-SLOW_MACHINE = timeit.timeit("2*2", number=10_000) > 0.0001
-
 try:
     from _remote_debugging import PROCESS_VM_READV_SUPPORTED
     import _remote_debugging
@@ -1757,7 +1754,7 @@ def main_loop():
 '''
 
     def test_sampling_basic_functionality(self):
-        duration_sec = 10 if SLOW_MACHINE else 2
+        duration_sec = 10 if is_slow_machine else 2
         with (
             test_subprocess(self.test_script) as subproc,
             io.StringIO() as captured_output,
@@ -1908,7 +1905,7 @@ def test_sample_target_script(self):
         script_file.flush()
         self.addCleanup(close_and_unlink, script_file)
 
-        duration = 10 if SLOW_MACHINE else 1
+        duration = 10 if is_slow_machine else 1
         test_args = [
             "profiling.sampling.sample", "-d", str(duration), script_file.name
         ]
@@ -1943,7 +1940,7 @@ def test_sample_target_module(self):
         with open(module_path, "w") as f:
             f.write(self.test_script)
 
-        duration = 10 if SLOW_MACHINE else 1
+        duration = 10 if is_slow_machine else 1
         test_args = [
             "profiling.sampling.sample",
             "-d", str(duration),