Add benchmark

src/activities/reader/EpubRenderBenchmarkActivity.h

@@ -0,0 +1,18 @@
+#pragma once
+
+#include <string>
+
+#include "activities/Activity.h"
+
+class EpubRenderBenchmarkActivity final : public Activity {
+ public:
+  explicit EpubRenderBenchmarkActivity(GfxRenderer& renderer, MappedInputManager& mappedInput, std::string report)
+      : Activity("EpubRenderBenchmark", renderer, mappedInput), report(std::move(report)) {}
+
+  void onEnter() override;
+  void loop() override;
+  void render(RenderLock&&) override;
+
+ private:
+  std::string report;
+};