1 files changed, 83 insertions, 0 deletions
diff --git a/bench/ChecksumBench.cpp b/bench/ChecksumBench.cpp
new file mode 100644
index 0000000000..9057d1272b
--- /dev/null
+++ b/bench/ChecksumBench.cpp
@@ -0,0 +1,83 @@
+/*
+ * Copyright 2012 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+#include "SkBenchmark.h"
+#include "SkCanvas.h"
+#include "SkChecksum.h"
+#include "SkString.h"
+
+class ComputeChecksumBench : public SkBenchmark {
+public:
+    ComputeChecksumBench(void* param, const char name[]) : INHERITED(param) {
+        fName.printf("compute_checksum_%s", name);
+    }
+
+    enum {
+        DATA_SIZE = 1024,
+        N         = SkBENCHLOOP(100000),
+    };
+protected:
+    virtual const char* onGetName() {
+        return fName.c_str();
+    }
+
+    virtual void onDraw(SkCanvas* canvas) {
+        uint64_t data[DATA_SIZE / sizeof(uint64_t)];
+        computeChecksum(data, DATA_SIZE);
+    }
+
+    virtual void computeChecksum(const uint64_t*, size_t) = 0;
+
+    SkString fName;
+private:
+    typedef SkBenchmark INHERITED;
+};
+
+/*
+ *  Use SkComputeChecksum32 to compute a checksum on a datablock
+ */
+class ComputeChecksum32Bench : public ComputeChecksumBench {
+public:
+    ComputeChecksum32Bench(void* param)
+        : INHERITED(param, "32") { }
+
+protected:
+    virtual void computeChecksum(const uint64_t* data, size_t len) {
+        for (int i = 0; i < N; i++) {
+            volatile uint32_t result = SkComputeChecksum32(reinterpret_cast<const uint32_t*>(data), len);
+        }
+    }
+
+private:
+    typedef ComputeChecksumBench INHERITED;
+};
+
+/*
+ *  Use SkComputeChecksum64 to compute a checksum on a datablock
+ */
+class ComputeChecksum64Bench : public ComputeChecksumBench {
+public:
+    ComputeChecksum64Bench(void* param)
+        : INHERITED(param, "64") { }
+
+protected:
+    virtual void computeChecksum(const uint64_t* data, size_t len) {
+        for (int i = 0; i < N; i++) {
+            volatile uint64_t result = SkComputeChecksum64(data, len);
+        }
+    }
+
+private:
+    typedef ComputeChecksumBench INHERITED;
+};
+
+///////////////////////////////////////////////////////////////////////////////
+
+static SkBenchmark* Fact0(void* p) { return new ComputeChecksum32Bench(p); }
+static SkBenchmark* Fact1(void* p) { return new ComputeChecksum64Bench(p); }
+
+static BenchRegistry gReg0(Fact0);
+static BenchRegistry gReg1(Fact1);