add pycparser benchmark

Author: undingen

benchmarks/pycparser_bench.py

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+import json
+import os
+import sys
+import time
+
+from pycparser import c_parser, c_ast
+
+def parse_files(files):
+    for code in files:
+        parser = c_parser.CParser()
+        ast = parser.parse(code, '')
+        assert isinstance(ast, c_ast.FileAST)
+
+if __name__ == "__main__":
+    n = 20
+    if len(sys.argv) > 1:
+        n = int(sys.argv[1])
+
+    files = []
+    directory = os.path.abspath(__file__ + "/../../data/pycparser_target")
+    for filename in os.listdir(directory):
+        filename = os.path.join(directory, filename)
+        if not filename.endswith(".ppout"):
+            continue
+        with open(filename) as f:
+            files.append(f.read())
+
+    times = []
+    for i in range(n):
+        times.append(time.time())
+        
+        parse_files(files)
+
+    times.append(time.time())
+
+    if len(sys.argv) > 2:
+        json.dump(times, open(sys.argv[2], 'w'))

benchmarks/pycparser_bench_requirements.txt

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+pycparser==2.20

data/pycparser_target/README

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+Benchmark examples are copied from:
+https://github.com/eliben/pycparser/tree/master/utils/benchmark ref 5d5904d2538e054356ac01ba9ef965783f73e36b
+
+