adjust pure_python check for option that PyPy might have _pickle

Author: mattip

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

@@ -266,10 +266,10 @@ def add_cmdline_args(cmd, args):
     if options.pure_python:
         name += "_pure_python"
 
-    if not (options.pure_python or IS_PYPY):
+    if not (options.pure_python):
         # C accelerators are enabled by default on 3.x
         import pickle
-        if not is_accelerated_module(pickle):
+        if not is_accelerated_module(pickle) and not IS_PYPY:
             raise RuntimeError("Missing C accelerators for pickle")
     else:
         sys.modules['_pickle'] = None