Avoid marking on simple array data's

Speeds up things by 2-3%.

Change-Id: Ib17ab126cf91ce48a0ced7dd7b06c4f7f0a70a3b
Reviewed-by: Erik Verbruggen <erik.verbruggen@qt.io>

1 files changed, 6 insertions, 0 deletions

diff --git a/src/qml/jsruntime/qv4engine.cpp b/src/qml/jsruntime/qv4engine.cpp
index 049e4a117d..78c10eacc7 100644
--- a/src/qml/jsruntime/qv4engine.cpp
+++ b/src/qml/jsruntime/qv4engine.cpp
@@ -585,6 +585,12 @@ Heap::ArrayObject *ExecutionEngine::newArrayObject(const Value *values, int leng
         // this doesn't require a write barrier, things will be ok, when the new array data gets inserted into
         // the parent object
         memcpy(&d->values.values, values, length*sizeof(Value));
+        for (int i = 0; i < length; ++i) {
+            if (values[i].isManaged()) {
+                d->needsMark = true;
+                break;
+            }
+        }
         a->d()->arrayData.set(this, d);
         a->setArrayLengthUnchecked(length);
     }