1 files changed, 31 insertions, 0 deletions
diff --git a/layout/style/ServoTraversalStatistics.h b/layout/style/ServoTraversalStatistics.h
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+++ b/layout/style/ServoTraversalStatistics.h
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+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef mozilla_ServoTraversalStatistics_h
+#define mozilla_ServoTraversalStatistics_h
+
+#include <inttypes.h>
+
+namespace mozilla {
+
+// Traversal statistics for Servo traversal.
+//
+// See style::context::PerThreadTraversalStatistics for
+// meaning of these fields.
+struct ServoTraversalStatistics {
+  uint32_t mElementsTraversed = 0;
+  uint32_t mElementsStyled = 0;
+  uint32_t mElementsMatched = 0;
+  uint32_t mStylesShared = 0;
+  uint32_t mStylesReused = 0;
+
+  static bool sActive;
+  static ServoTraversalStatistics sSingleton;
+};
+
+}  // namespace mozilla
+
+#endif  // mozilla_ServoTraversalStatistics_h