use abs path over relative path

Author: Fidget-Spinner

pyperformance/benchmarks/bm_mypy_types.py

@@ -4,9 +4,10 @@
 # commit: 0fcc5299e6fefba7eefcacd4aceb112971d48c7b on 21 Oct 2020.
 # license: https://github.com/pyston/python-macrobenchmarks/blob/main/LICENSE
 # It has been updated and modified for pyperformance.
-# The benchmark runs mypy against its own types file multiple times.
+# The benchmark runs mypy against its own types file.
 
 import os
+import sys
 
 import pyperf
 
@@ -16,7 +17,7 @@
     runner = pyperf.Runner()
     runner.metadata['description'] = ('Mypy benchmark: '
                                       'type-check mypy/types.py')
-    target_path = os.path.join(os.path.dirname(__file__), 'data',
-                               'bm_mypy_target.py')
-    runner.bench_command('mypy_types', ['mypy', target_path])
+    target_path = os.path.abspath(os.path.join(os.path.dirname(__file__), 'data',
+                                               'bm_mypy_target.py'))
+    runner.bench_command('mypy_types', [sys.executable, '-m', 'mypy', target_path])