From 878dc5c7ae259a70c13fee9689a62e4c4ff30a87 Mon Sep 17 00:00:00 2001
From: Tor Egge <Tor.Egge@broadpark.no>
Date: Mon, 4 May 2020 15:26:04 +0200
Subject: Avoid making copies of container elements.

---
 eval/src/vespa/eval/tensor/dense/dense_lambda_peek_optimizer.cpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/eval/src/vespa/eval/tensor/dense/dense_lambda_peek_optimizer.cpp b/eval/src/vespa/eval/tensor/dense/dense_lambda_peek_optimizer.cpp
index cb42ff86fbe..54ea35e9efe 100644
--- a/eval/src/vespa/eval/tensor/dense/dense_lambda_peek_optimizer.cpp
+++ b/eval/src/vespa/eval/tensor/dense/dense_lambda_peek_optimizer.cpp
@@ -91,10 +91,10 @@ struct PeekAnalyzer {
     PeekAnalyzer(const ValueType &dst_type, const ValueType &src_type,
                  const TensorPeek::DimList &dim_list)
     {
-        for (const auto dim: dst_type.dimensions()) {
+        for (const auto& dim: dst_type.dimensions()) {
             dst_dim_sizes.push_back(dim.size);
         }
-        for (const auto dim: src_type.dimensions()) {
+        for (const auto& dim: src_type.dimensions()) {
             src_dim_sizes.push_back(dim.size);
         }
         Node_UP idx_expr;
-- 
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