Update

subprojects/gst-devtools/debug-viewer/GstDebugViewer/tests/performance.py

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+#!/usr/bin/env python
+# -*- coding: utf-8; mode: python; -*-
+#
+#  GStreamer Debug Viewer - View and analyze GStreamer debug log files
+#
+#  Copyright (C) 2007 René Stadler <mail@renestadler.de>
+#
+#  This program is free software; you can redistribute it and/or modify it
+#  under the terms of the GNU General Public License as published by the Free
+#  Software Foundation; either version 3 of the License, or (at your option)
+#  any later version.
+#
+#  This program is distributed in the hope that it will be useful, but WITHOUT
+#  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+#  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+#  more details.
+#
+#  You should have received a copy of the GNU General Public License along with
+#  this program.  If not, see <http://www.gnu.org/licenses/>.
+
+"""GStreamer Debug Viewer performance test program."""
+
+import sys
+import os
+import os.path
+from glob import glob
+import time
+
+import gi
+
+from gi.repository import GObject
+
+from .. import Common, Data, GUI
+
+
+class TestParsingPerformance (object):
+
+    def __init__(self, filename):
+
+        self.main_loop = GObject.MainLoop()
+        self.log_file = Data.LogFile(filename, Common.Data.DefaultDispatcher())
+        self.log_file.consumers.append(self)
+
+    def start(self):
+
+        self.log_file.start_loading()
+
+    def handle_load_started(self):
+
+        self.start_time = time.time()
+
+    def handle_load_finished(self):
+
+        diff = time.time() - self.start_time
+        print("line cache built in %0.1f ms" % (diff * 1000.,))
+
+        start_time = time.time()
+        model = GUI.LazyLogModel(self.log_file)
+        for row in model:
+            pass
+        diff = time.time() - start_time
+        print("model iterated in %0.1f ms" % (diff * 1000.,))
+        print("overall time spent: %0.1f s" % (time.time() - self.start_time,))
+
+        import resource
+        rusage = resource.getrusage(resource.RUSAGE_SELF)
+        print("time spent in user mode: %.2f s" % (rusage.ru_utime,))
+        print("time spent in system mode: %.2f s" % (rusage.ru_stime,))
+
+
+def main():
+
+    if len(sys.argv) > 1:
+        test = TestParsingPerformance(sys.argv[1])
+        test.start()
+
+
+if __name__ == "__main__":
+    main()