From 6e436b7a590bb5d7127c1cd28d2ab18e35b7d47b Mon Sep 17 00:00:00 2001
From: Sebastian Messmer <mail@smessmer.de>
Date: Sun, 4 Oct 2015 17:14:02 +0200
Subject: [PATCH] Return reference to keys, don't copy keys

---
 implementations/onblocks/BlobOnBlocks.cpp | 2 +-
 implementations/onblocks/BlobOnBlocks.h   | 2 +-
 interface/Blob.h                          | 2 +-
 3 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/implementations/onblocks/BlobOnBlocks.cpp b/implementations/onblocks/BlobOnBlocks.cpp
index 6e3971dd..cc57dd3d 100644
--- a/implementations/onblocks/BlobOnBlocks.cpp
+++ b/implementations/onblocks/BlobOnBlocks.cpp
@@ -76,7 +76,7 @@ void BlobOnBlocks::flush() {
   _datatree->flush();
 }
 
-Key BlobOnBlocks::key() const {
+const Key &BlobOnBlocks::key() const {
   return _datatree->key();
 }
 
diff --git a/implementations/onblocks/BlobOnBlocks.h b/implementations/onblocks/BlobOnBlocks.h
index 91f3d836..db609dab 100644
--- a/implementations/onblocks/BlobOnBlocks.h
+++ b/implementations/onblocks/BlobOnBlocks.h
@@ -20,7 +20,7 @@ public:
   BlobOnBlocks(cpputils::unique_ref<parallelaccessdatatreestore::DataTreeRef> datatree);
   virtual ~BlobOnBlocks();
 
-  blockstore::Key key() const override;
+  const blockstore::Key &key() const override;
 
   uint64_t size() const override;
   void resize(uint64_t numBytes) override;
diff --git a/interface/Blob.h b/interface/Blob.h
index 32c25a96..4f832e4d 100644
--- a/interface/Blob.h
+++ b/interface/Blob.h
@@ -13,7 +13,7 @@ public:
   virtual ~Blob() {}
 
   //TODO Use own Key class for blobstore
-  virtual blockstore::Key key() const = 0;
+  virtual const blockstore::Key &key() const = 0;
 
   virtual uint64_t size() const = 0;
   virtual void resize(uint64_t numBytes) = 0;