gh-140381: Increase slow_fibonacci call frequency in test_profiling (#140673)

Author: ThierryMT

Lib/test/test_profiling/test_sampling_profiler/test_integration.py

@@ -414,8 +414,8 @@ def main_loop():
         if iteration % 3 == 0:
             # Very CPU intensive
             result = cpu_intensive_work()
-        elif iteration % 5 == 0:
-            # Expensive recursive operation
+        elif iteration % 2 == 0:
+            # Expensive recursive operation (increased frequency for slower machines)
             result = slow_fibonacci(12)
         else:
             # Medium operation

Misc/NEWS.d/next/Tests/2025-10-27-15-53-47.gh-issue-140381.N5o3pa.rst

@@ -0,0 +1 @@
+Fix flaky test_profiling tests on i686 and s390x architectures by increasing slow_fibonacci call frequency from every 5th iteration to every 2nd iteration.