gh-117594: Require cpu resource to test_search_anchor_at_beginning (gh-117595)

Author: corona10

Lib/test/test_re.py

@@ -1,7 +1,7 @@
 from test.support import (gc_collect, bigmemtest, _2G,
                           cpython_only, captured_stdout,
                           check_disallow_instantiation, is_emscripten, is_wasi,
-                          warnings_helper, SHORT_TIMEOUT, CPUStopwatch)
+                          warnings_helper, SHORT_TIMEOUT, CPUStopwatch, requires_resource)
 import locale
 import re
 import string
@@ -2282,6 +2282,9 @@ def test_bug_40736(self):
         with self.assertRaisesRegex(TypeError, "got 'type'"):
             re.search("x*", type)
 
+    # gh-117594: The test is not slow by itself, but it relies on
+    # the absolute computation time and can fail on very slow computers.
+    @requires_resource('cpu')
     def test_search_anchor_at_beginning(self):
         s = 'x'*10**7
         with CPUStopwatch() as stopwatch: