1 files changed, 29 insertions, 0 deletions
diff --git a/js/public/friend/PerformanceHint.h b/js/public/friend/PerformanceHint.h
new file mode 100644
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+++ b/js/public/friend/PerformanceHint.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 js_friend_PerformanceHint_h
+#define js_friend_PerformanceHint_h
+
+#include "jstypes.h"       // JS_PUBLIC_API
+#include "js/TypeDecls.h"  // JSContext
+
+namespace js {
+namespace gc {
+
+// API to let the DOM tell us whether we're currently in pageload.
+//
+// This currently affects nursery sizing; we tolerate large nursery sizes (and
+// hence longer minor GC pauses) during pageload so as not to limit performance.
+
+enum class PerformanceHint { Normal, InPageLoad };
+
+extern JS_PUBLIC_API void SetPerformanceHint(JSContext* cx,
+                                             PerformanceHint hint);
+
+} /* namespace gc */
+} /* namespace js */
+
+#endif  // js_friend_PerformanceHint_h