Uniform: use QVarLengthArray<16 ,float> instead of <4, float>

This otherwise yield for lots of reallocations that could be avoided.
The gains seem to be about 2/3% of cpu usage according the analysis
with vTune.

It does indeed mean that for smaller uniforms vec4, float, sampler
we are wasting a bit of memory. The impact of this is likely to be
unsignificant though.

Change-Id: Id72c81a795bf9326ef48b170bb0806de9b430412
Reviewed-by: Mike Krus <mike.krus@kdab.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/src/render/backend/uniform_p.h b/src/render/backend/uniform_p.h
index 09575a077..634c0cd96 100644
--- a/src/render/backend/uniform_p.h
+++ b/src/render/backend/uniform_p.h
@@ -229,7 +229,7 @@ public:
 private:
     // Allocate 4 floats on stack
     // For larger elements, heap allocation will be used
-    QVarLengthArray<float, 4> m_data;
+    QVarLengthArray<float, 16> m_data;
 
     ValueType m_valueType = ScalarValue;