Add a script to report timing data for all tests in a WPT log.

etc/wpt-timing.py

@@ -0,0 +1,80 @@
+#!/usr/bin/env python
+
+# Copyright 2019 The Servo Project Developers. See the COPYRIGHT
+# file at the top-level directory of this distribution.
+#
+# Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+# http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+# <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+# option. This file may not be copied, modified, or distributed
+# except according to those terms.
+
+import sys
+import json
+import itertools
+import collections
+import csv
+
+def process_log(data):
+    tests = {}
+    test_results = collections.defaultdict(list)
+
+    for entry in data:
+        entry = json.loads(entry)
+        if "action" in entry:
+            if entry["action"] == "test_start":
+                tests[entry["test"]] = {
+                    "start": int(entry["time"]),
+                    "end": 0,
+                }
+            elif entry["action"] == "test_end":
+                test = tests[entry["test"]]
+                test["end"] = int(entry["time"])
+                test_results[entry["status"]] += [
+                    (entry["test"], test["end"] - test["start"])
+                ]
+
+    return test_results
+
+test_results = {
+    "SKIP": [],
+    "OK": [],
+    "PASS": [],
+    "ERROR": [],
+    "FAIL": [],
+    "CRASH": [],
+    "TIMEOUT": [],
+}
+for log_path in sys.argv[1:]:
+    with open(log_path) as f:
+        data = f.readlines()
+        for k, v in process_log(data).items():
+            test_results[k] += v
+
+print("Skipped %d tests." % len(test_results["SKIP"]))
+print("%d tests timed out." % len(test_results["TIMEOUT"]))
+
+longest_crash = sorted(test_results["CRASH"], key=lambda x: x[1], reverse=True)
+print("Longest CRASH test took %dms (%s)" % (longest_crash[0][1], longest_crash[0][0]))
+
+longest_ok = sorted(
+    test_results["PASS"] + test_results["OK"],
+    key=lambda x: x[1], reverse=True
+)
+csv_data = [['Test path', 'Milliseconds']]
+with open('longest_ok.csv', 'w') as csv_file:
+    writer = csv.writer(csv_file)
+    writer.writerows(csv_data + longest_ok)
+
+longest_fail = sorted(
+    test_results["ERROR"] + test_results["FAIL"],
+    key=lambda x: x[1], reverse=True
+)
+with open('longest_err.csv', 'w') as csv_file:
+    writer = csv.writer(csv_file)
+    writer.writerows(csv_data + longest_fail)
+    
+longest_timeout = sorted(test_results["TIMEOUT"], key=lambda x: x[1], reverse=True)
+with open('timeouts.csv', 'w') as csv_file:
+    writer = csv.writer(csv_file)
+    writer.writerows(csv_data + longest_timeout)