Pass {Duration,TimePoint} by const ref if possible

1 files changed, 5 insertions, 5 deletions

diff --git a/src/mbgl/renderer/frame_history.hpp b/src/mbgl/renderer/frame_history.hpp
index 15ca92e469..ef52b2a5ec 100644
--- a/src/mbgl/renderer/frame_history.hpp
+++ b/src/mbgl/renderer/frame_history.hpp
@@ -11,8 +11,8 @@
 namespace mbgl {
 
 struct FrameSnapshot {
-    explicit inline FrameSnapshot(TimePoint now_, float z_) : now(now_), z(z_) {}
-    TimePoint now;
+    explicit inline FrameSnapshot(const TimePoint& now_, float z_) : now(now_), z(z_) {}
+    const TimePoint now;
     float z;
 };
 
@@ -26,10 +26,10 @@ struct FadeProperties {
 class FrameHistory {
 public:
     // Record frame history that will be used to calculate fading params
-    void record(TimePoint now, float zoom);
+    void record(const TimePoint& now, float zoom);
 
-    bool needsAnimation(Duration) const;
-    FadeProperties getFadeProperties(Duration);
+    bool needsAnimation(const Duration& duration) const;
+    FadeProperties getFadeProperties(const Duration& duration);
 
 public:
     std::deque<FrameSnapshot> history;