QtQuick: Micro-optimize iterator loops.

Avoid repeated instantiation of end() in loops, use variable instead.

Change-Id: I6ab1fe2b82406d5ee91710a0333587ffb82c04d4
Reviewed-by: Erik Verbruggen <erik.verbruggen@theqtcompany.com>

1 files changed, 5 insertions, 2 deletions

diff --git a/src/particles/qquickcustomparticle.cpp b/src/particles/qquickcustomparticle.cpp
index 9c82599c20..32cde7c126 100644
--- a/src/particles/qquickcustomparticle.cpp
+++ b/src/particles/qquickcustomparticle.cpp
@@ -303,6 +303,8 @@ QQuickShaderEffectNode *QQuickCustomParticle::prepareNextFrame(QQuickShaderEffec
 
 QQuickShaderEffectNode* QQuickCustomParticle::buildCustomNodes()
 {
+    typedef QHash<int, QQuickShaderEffectNode*>::const_iterator NodeHashConstIt;
+
     if (!QOpenGLContext::currentContext())
         return 0;
 
@@ -368,10 +370,11 @@ QQuickShaderEffectNode* QQuickCustomParticle::buildCustomNodes()
         }
     }
 
-    QHash<int, QQuickShaderEffectNode*>::const_iterator it = m_nodes.begin();
+    NodeHashConstIt it = m_nodes.begin();
     rootNode = it.value();
     rootNode->setFlag(QSGNode::OwnsMaterial, true);
-    for (++it; it != m_nodes.end(); ++it)
+    const NodeHashConstIt cend = m_nodes.end();
+    for (++it; it != cend; ++it)
         rootNode->appendChildNode(it.value());
 
     return rootNode;