Comparison of max pool benchmark between CPU and GPU (#95)

* Comparison max pool benchmark between CPU and GPU

Author: Lewuathe

demos/benchmarks/math-benchmark-run-groups.ts

@@ -19,6 +19,7 @@ import * as conv_transpose_gpu_benchmark from './conv_transpose_gpu_benchmark';
 import * as logsumexp_cpu_benchmark from './logsumexp_cpu_benchmark';
 import * as logsumexp_gpu_benchmark from './logsumexp_gpu_benchmark';
 import * as max_pool_gpu_benchmark from './max_pool_gpu_benchmark';
+import * as max_pool_cpu_benchmark from './max_pool_cpu_benchmark';
 import * as mulmat_cpu_benchmark from './mulmat_cpu_benchmark';
 import * as mulmat_gpu_benchmark from './mulmat_gpu_benchmark';
 
@@ -55,14 +56,17 @@ export const BENCHMARK_RUN_GROUPS: BenchmarkRunGroup[] = [
         'd1=1, d2=1, f=11, s=1', conv_transpose_gpu_benchmark.BENCHMARK_TEST)],
   },
   {
-    name: 'Max pool (GPU)',
+    name: 'Max pool (CPU vs GPU): d1=1, d2=1, f=11, s=1',
     min: 0,
     max: 1024,
     stepSize: 64,
     stepToSizeTransformation: (step: number) => Math.max(1, step),
-    benchmarkRuns: [new BenchmarkRun(
-        'd1=1, d2=1, f=11, s=1',
-        max_pool_gpu_benchmark.MAX_POOL_BENCHMARK_TEST)],
+    benchmarkRuns: [
+      new BenchmarkRun('max_pool_gpu',
+        max_pool_gpu_benchmark.MAX_POOL_BENCHMARK_TEST),
+      new BenchmarkRun('max_pool_cpu',
+        max_pool_cpu_benchmark.MAX_POOL_BENCHMARK_TEST)
+    ],
   },
   {
     name: 'LogSumExp (CPU vs GPU): input [size, size]',

demos/benchmarks/max_pool_cpu_benchmark.ts

@@ -0,0 +1,51 @@
+/* Copyright 2017 Google Inc. All Rights Reserved.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+==============================================================================*/
+
+import * as conv_util from '../../src/math/conv_util';
+import {NDArrayMathCPU} from '../../src/math/math_cpu';
+import {Array3D} from '../../src/math/ndarray';
+
+import {BenchmarkTest} from './benchmark';
+
+const OP_RUNS = 40;
+
+export const MAX_POOL_BENCHMARK_TEST: BenchmarkTest = (size: number) => {
+  if (size > 512) {
+    return -1;
+  }
+  const positions = false;
+  return testMaxPool(size, positions);
+};
+
+function testMaxPool(size: number, positions: boolean): number {
+  const math = new NDArrayMathCPU();
+  const outputDepth = 1;
+  const xShape: [number, number, number] = [size, size, outputDepth];
+  const fieldSize = 11;
+  const stride = 1;
+  const zeroPad = conv_util.computeDefaultPad(xShape, fieldSize, stride);
+
+  const x = Array3D.randUniform(xShape, -1, 1);
+
+  const start = performance.now();
+  for (let i = 0; i < OP_RUNS; i++) {
+    math.maxPool(x as Array3D, fieldSize, stride, zeroPad);
+  }
+  const avgTime = (performance.now() - start) / OP_RUNS;
+
+  x.dispose();
+
+  return avgTime;
+}