diff options
Diffstat (limited to 'src/corelib/kernel/qproperty.cpp')
-rw-r--r-- | src/corelib/kernel/qproperty.cpp | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/src/corelib/kernel/qproperty.cpp b/src/corelib/kernel/qproperty.cpp index f62810518b..beba05c01e 100644 --- a/src/corelib/kernel/qproperty.cpp +++ b/src/corelib/kernel/qproperty.cpp @@ -193,14 +193,17 @@ static thread_local BindingEvaluationState *currentBindingEvaluationState = null BindingEvaluationState::BindingEvaluationState(QPropertyBindingPrivate *binding) : binding(binding) { - previousState = currentBindingEvaluationState; - currentBindingEvaluationState = this; + // store a pointer to the currentBindingEvaluationState to avoid a TLS lookup in + // the destructor (as these come with a non zero cost) + currentState = ¤tBindingEvaluationState; + previousState = *currentState; + *currentState = this; binding->clearDependencyObservers(); } BindingEvaluationState::~BindingEvaluationState() { - currentBindingEvaluationState = previousState; + *currentState = previousState; } void QPropertyBase::evaluateIfDirty() |