From af437047a2d849d19f8de01b5ecfb685f813d6a2 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Thorbj=C3=B8rn=20Lund=20Martsum?= <tmartsum@gmail.com>
Date: Sun, 28 Oct 2012 15:36:11 +0100
Subject: QMap - improve QMap stl-map ctor

We can insert directly on the most left-most Node.

We always enforce an insert here (unlike the insert call),
but that is not a problem since the keys in a std::map are unique.

Change-Id: Ib409b90ffc57a5a43dab4a4b08d34f6fdabd057f
Reviewed-by: Lars Knoll <lars.knoll@digia.com>
---
 tests/benchmarks/corelib/tools/qmap/main.cpp | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

(limited to 'tests/benchmarks')

diff --git a/tests/benchmarks/corelib/tools/qmap/main.cpp b/tests/benchmarks/corelib/tools/qmap/main.cpp
index 4d9833b7a1..c11e54ff1d 100644
--- a/tests/benchmarks/corelib/tools/qmap/main.cpp
+++ b/tests/benchmarks/corelib/tools/qmap/main.cpp
@@ -62,6 +62,8 @@ private slots:
     void iteration();
     void toStdMap();
     void iterator_begin();
+
+    void ctorStdMap();
 };
 
 
@@ -189,6 +191,19 @@ void tst_QMap::iterator_begin()
     }
 }
 
+void tst_QMap::ctorStdMap()
+{
+    std::map<int, int> map;
+    for (int i = 0; i < 100000; ++i)
+        map.insert(std::pair<int, int>(i, i));
+
+    QBENCHMARK {
+        QMap<int, int> qmap(map);
+        qmap.constBegin();
+    }
+}
+
+
 QTEST_MAIN(tst_QMap)
 
 #include "main.moc"
-- 
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