1 files changed, 24 insertions, 0 deletions
diff --git a/testing/gtest/bench.py b/testing/gtest/bench.py
new file mode 100755
index 0000000000..e63e491080
--- /dev/null
+++ b/testing/gtest/bench.py
@@ -0,0 +1,24 @@
+#!/usr/bin/env python3
+
+import json
+import statistics
+import subprocess
+import sys
+
+proc = subprocess.Popen(["./mach", "gtest", sys.argv[1]], stdout=subprocess.PIPE)
+for line in proc.stdout:
+    if line.startswith(b"PERFHERDER_DATA:"):
+        data = json.loads(line[len("PERFHERDER_DATA:") :].decode("utf8"))
+        for suite in data["suites"]:
+            for subtest in suite["subtests"]:
+                # pylint --py3k W1619
+                print(
+                    "%4d.%03d ± %6s ms    %s.%s"
+                    % (
+                        subtest["value"] / 1000.0,
+                        subtest["value"] % 1000,
+                        "%.3f" % (statistics.stdev(subtest["replicates"]) / 1000),
+                        suite["name"],
+                        subtest["name"],
+                    )
+                )