Add initial benchmarks for CanvasOp

Also some minor other tweaks

Test: this
Change-Id: Idb8a5955839893ff000de87d4899fd130ede061c
diff --git a/libs/hwui/tests/microbench/RenderNodeBench.cpp b/libs/hwui/tests/microbench/RenderNodeBench.cpp
index 206dcd5..011939a 100644
--- a/libs/hwui/tests/microbench/RenderNodeBench.cpp
+++ b/libs/hwui/tests/microbench/RenderNodeBench.cpp
@@ -30,3 +30,29 @@
     }
 }
 BENCHMARK(BM_RenderNode_create);
+
+void BM_RenderNode_recordSimple(benchmark::State& state) {
+    sp<RenderNode> node = new RenderNode();
+    std::unique_ptr<Canvas> canvas(Canvas::create_recording_canvas(100, 100));
+    delete canvas->finishRecording();
+
+    while (state.KeepRunning()) {
+        canvas->resetRecording(100, 100, node.get());
+        canvas->drawColor(0x00000000, SkBlendMode::kSrcOver);
+        node->setStagingDisplayList(canvas->finishRecording());
+    }
+}
+BENCHMARK(BM_RenderNode_recordSimple);
+
+void BM_RenderNode_recordSimpleWithReuse(benchmark::State& state) {
+    sp<RenderNode> node = new RenderNode();
+    std::unique_ptr<Canvas> canvas(Canvas::create_recording_canvas(100, 100));
+    delete canvas->finishRecording();
+
+    while (state.KeepRunning()) {
+        canvas->resetRecording(100, 100, node.get());
+        canvas->drawColor(0x00000000, SkBlendMode::kSrcOver);
+        canvas->finishRecording()->reuseDisplayList(node.get());
+    }
+}
+BENCHMARK(BM_RenderNode_recordSimpleWithReuse);
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