+ increase_int_max_str_digits() decorator

Author: skirpichev

pyperformance/data-files/benchmarks/bm_decimal_factorial/run_benchmark.py

@@ -5,7 +5,8 @@
   Modules/_decimal/tests/bench.py in the CPython source and adapted to use
   pyperf.
 - 2026-02-22: Sergey B Kirpichev adapted context settings and tested
-  values to support also pure-Python decimal module.
+  values to support also pure-Python decimal module, copy
+  increase_int_max_str_digits() decorator.
 """
 
 # Original copyright notice in CPython source:
@@ -20,7 +21,7 @@
     import _decimal
 except ImportError:
     _decimal = None
-
+import sys
 
 import pyperf
 
@@ -36,6 +37,20 @@ def factorial(n, m):
         return factorial(n, (n + m) // 2) * factorial((n + m) // 2 + 1, m)
 
 
+def increase_int_max_str_digits(maxdigits):
+    def _increase_int_max_str_digits(func, maxdigits=maxdigits):
+        @wraps(func)
+        def wrapper(*args, **kwargs):
+            previous_int_limit = sys.get_int_max_str_digits()
+            sys.set_int_max_str_digits(maxdigits)
+            ans = func(*args, **kwargs)
+            sys.set_int_max_str_digits(previous_int_limit)
+            return ans
+        return wrapper
+    return _increase_int_max_str_digits
+
+
+@increase_int_max_str_digits(maxdigits=10000000)
 def bench_decimal_factorial():
     c = decimal.getcontext()
     if _decimal: