[Impeller] Add benchmarks that measure the time it takes to record canvas operations.

BUILD.gn

@@ -125,6 +125,7 @@ group("flutter") {
       "//flutter/display_list:display_list_builder_benchmarks",
       "//flutter/display_list:display_list_region_benchmarks",
       "//flutter/fml:fml_benchmarks",
+      "//flutter/impeller/aiks:canvas_benchmarks",
       "//flutter/impeller/geometry:geometry_benchmarks",
       "//flutter/lib/ui:ui_benchmarks",
       "//flutter/shell/common:shell_benchmarks",

ci/builders/linux_host_engine.json

@@ -209,6 +209,7 @@
                     "flutter/display_list:display_list_builder_benchmarks",
                     "flutter/fml:fml_benchmarks",
                     "flutter/impeller/geometry:geometry_benchmarks",
+                    "flutter/impeller/aiks:canvas_benchmarks",
                     "flutter/lib/ui:ui_benchmarks",
                     "flutter/shell/common:shell_benchmarks",
                     "flutter/shell/testing",

ci/builders/standalone/linux_benchmarks.json

@@ -23,6 +23,7 @@
             "flutter/display_list:display_list_builder_benchmarks",
             "flutter/fml:fml_benchmarks",
             "flutter/impeller/geometry:geometry_benchmarks",
+            "flutter/impeller/aiks:canvas_benchmarks",
             "flutter/lib/ui:ui_benchmarks",
             "flutter/shell/common:shell_benchmarks",
             "flutter/shell/testing",

ci/licenses_golden/licenses_flutter

@@ -4857,6 +4857,7 @@ ORIGIN: ../../../flutter/impeller/aiks/aiks_playground_inspector.cc + ../../../f
 ORIGIN: ../../../flutter/impeller/aiks/aiks_playground_inspector.h + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/impeller/aiks/canvas.cc + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/impeller/aiks/canvas.h + ../../../flutter/LICENSE
+ORIGIN: ../../../flutter/impeller/aiks/canvas_benchmarks.cc + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/impeller/aiks/canvas_recorder.h + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/impeller/aiks/canvas_type.h + ../../../flutter/LICENSE
 ORIGIN: ../../../flutter/impeller/aiks/color_filter.cc + ../../../flutter/LICENSE
@@ -7648,6 +7649,7 @@ FILE: ../../../flutter/impeller/aiks/aiks_playground_inspector.cc
 FILE: ../../../flutter/impeller/aiks/aiks_playground_inspector.h
 FILE: ../../../flutter/impeller/aiks/canvas.cc
 FILE: ../../../flutter/impeller/aiks/canvas.h
+FILE: ../../../flutter/impeller/aiks/canvas_benchmarks.cc
 FILE: ../../../flutter/impeller/aiks/canvas_recorder.h
 FILE: ../../../flutter/impeller/aiks/canvas_type.h
 FILE: ../../../flutter/impeller/aiks/color_filter.cc

impeller/aiks/BUILD.gn

@@ -121,3 +121,12 @@ impeller_component("aiks_unittests_golden") {
     "//flutter/testing:testing_lib",
   ]
 }
+
+executable("canvas_benchmarks") {
+  testonly = true
+  sources = [ "canvas_benchmarks.cc" ]
+  deps = [
+    ":aiks",
+    "//flutter/benchmarking",
+  ]
+}

impeller/aiks/canvas_benchmarks.cc

@@ -0,0 +1,63 @@
+// Copyright 2013 The Flutter Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "flutter/benchmarking/benchmarking.h"
+
+#include "impeller/aiks/canvas.h"
+
+namespace impeller {
+
+namespace {
+
+using CanvasCallback = size_t (*)(Canvas&);
+
+size_t DrawRect(Canvas& canvas) {
+  for (auto i = 0; i < 500; i++) {
+    canvas.DrawRect(Rect::MakeLTRB(0, 0, 100, 100),
+                    {.color = Color::DarkKhaki()});
+  }
+  return 500;
+}
+
+size_t DrawCircle(Canvas& canvas) {
+  for (auto i = 0; i < 500; i++) {
+    canvas.DrawCircle({100, 100}, 5, {.color = Color::DarkKhaki()});
+  }
+  return 500;
+}
+
+size_t DrawLine(Canvas& canvas) {
+  for (auto i = 0; i < 500; i++) {
+    canvas.DrawLine({0, 0}, {100, 100}, {.color = Color::DarkKhaki()});
+  }
+  return 500;
+}
+}  // namespace
+
+// A set of benchmarks that measures the CPU cost of encoding canvas operations.
+// These benchmarks do not measure the cost of conversion through the HAL, no
+// do they measure the GPU side cost of executing the required shader programs.
+template <class... Args>
+static void BM_CanvasRecord(benchmark::State& state, Args&&... args) {
+  auto args_tuple = std::make_tuple(std::move(args)...);
+  auto test_proc = std::get<CanvasCallback>(args_tuple);
+
+  size_t op_count = 0u;
+  size_t canvas_count = 0u;
+  while (state.KeepRunning()) {
+    // A new canvas is allocated for each iteration to avoid the benchmark
+    // becoming a measurement of only the entity vector re-allocation time.
+    Canvas canvas;
+    op_count += test_proc(canvas);
+    canvas_count++;
+  }
+  state.counters["TotalOpCount"] = op_count;
+  state.counters["TotalCanvasCount"] = canvas_count;
+}
+
+BENCHMARK_CAPTURE(BM_CanvasRecord, draw_rect, &DrawRect);
+BENCHMARK_CAPTURE(BM_CanvasRecord, draw_circle, &DrawCircle);
+BENCHMARK_CAPTURE(BM_CanvasRecord, draw_line, &DrawLine);
+
+}  // namespace impeller

testing/benchmark/generate_metrics.sh

@@ -15,3 +15,4 @@ $ENGINE_PATH/src/out/host_release/shell_benchmarks --benchmark_format=json > $EN
 $ENGINE_PATH/src/out/host_release/ui_benchmarks --benchmark_format=json > $ENGINE_PATH/src/out/host_release/ui_benchmarks.json
 $ENGINE_PATH/src/out/host_release/display_list_builder_benchmarks --benchmark_format=json > $ENGINE_PATH/src/out/host_release/display_list_builder_benchmarks.json
 $ENGINE_PATH/src/out/host_release/geometry_benchmarks --benchmark_format=json > $ENGINE_PATH/src/out/host_release/geometry_benchmarks.json
+$ENGINE_PATH/src/out/host_release/canvas_benchmarks --benchmark_format=json > $ENGINE_PATH/src/out/host_release/canvas_benchmarks.json

testing/benchmark/upload_metrics.sh

@@ -48,3 +48,5 @@ cd "$SCRIPT_DIR"
   --json $ENGINE_PATH/src/out/host_release/display_list_builder_benchmarks.json "$@"
 "$DART" --disable-dart-dev bin/parse_and_send.dart \
   --json $ENGINE_PATH/src/out/host_release/geometry_benchmarks.json "$@"
+"$DART" --disable-dart-dev bin/parse_and_send.dart \
+  --json $ENGINE_PATH/src/out/host_release/canvas_benchmarks.json "$@"

testing/run_tests.py

@@ -580,6 +580,10 @@ def run_engine_benchmarks(build_dir, executable_filter):
       build_dir, 'geometry_benchmarks', executable_filter, icu_flags
   )
 
+  run_engine_executable(
+      build_dir, 'canvas_benchmarks', executable_filter, icu_flags
+  )
+
   if is_linux():
     run_engine_executable(
         build_dir, 'txt_benchmarks', executable_filter, icu_flags