1 files changed, 58 insertions, 0 deletions
diff --git a/utils/benchmark/benchmark-parse.py b/utils/benchmark/benchmark-parse.py
new file mode 100644
index 0000000..003acda
--- /dev/null
+++ b/utils/benchmark/benchmark-parse.py
@@ -0,0 +1,58 @@
+#-----------------------------------------------------------------
+# Benchmarking utility for internal use.
+#
+# Use with Python 3.6+
+#
+# Eli Bendersky [https://eli.thegreenplace.net/]
+# License: BSD
+#-----------------------------------------------------------------
+import os
+import statistics
+import sys
+import time
+
+sys.path.extend(['.', '..'])
+
+from pycparser import c_parser, c_ast
+
+
+def measure_parse(text, n, progress_cb):
+    """Measure the parsing of text with pycparser.
+
+    text should represent a full file. n is the number of iterations to measure.
+    progress_cb will be called with the iteration number each time one is done.
+
+    Returns a list of elapsed times, one per iteration.
+    """
+    times = []
+    for i in range(n):
+        parser = c_parser.CParser()
+        t1 = time.time()
+        ast = parser.parse(text, '')
+        elapsed = time.time() - t1
+        assert isinstance(ast, c_ast.FileAST)
+        times.append(elapsed)
+        progress_cb(i)
+    return times
+
+
+def measure_file(filename, n):
+    progress_cb = lambda i: print('.', sep='', end='', flush=True)
+    with open(filename) as f:
+        print('%-25s' % os.path.basename(filename), end='', flush=True)
+        text = f.read()
+        times = measure_parse(text, n, progress_cb)
+    print('    Mean: %.3f  Stddev: %.3f' % (statistics.mean(times),
+                                            statistics.stdev(times)))
+
+
+NUM_RUNS = 5
+
+
+if __name__ == '__main__':
+    if len(sys.argv) < 2:
+        print("Usage: %s <dir with input files>")
+        sys.exit(1)
+    for filename in os.listdir(sys.argv[1]):
+        filename = os.path.join(sys.argv[1], filename)
+        measure_file(filename, NUM_RUNS)