From 7796f00dcfd09ca52140c4133ddc9bc197b832db Mon Sep 17 00:00:00 2001
From: Florin Malita <fmalita@chromium.org>
Date: Fri, 8 Jun 2018 12:25:38 -0400
Subject: SkJson

For now this is only wired to a bench and a couple of tests.

Local numbers, for a ~500KB BM "compressed" json:

    micros   	bench
   2456.54  	json_rapidjson	nonrendering
   1192.38  	json_skjson	nonrendering


Change-Id: I7b3514f84c7c525d1787722c43ad6095e3692563
Reviewed-on: https://skia-review.googlesource.com/127622
Reviewed-by: Mike Klein <mtklein@google.com>
Commit-Queue: Florin Malita <fmalita@chromium.org>
---
 modules/skjson/src/SkJSONBench.cpp | 167 +++++++++++++++++++++++++++++++++++++
 1 file changed, 167 insertions(+)
 create mode 100644 modules/skjson/src/SkJSONBench.cpp

(limited to 'modules/skjson/src/SkJSONBench.cpp')

diff --git a/modules/skjson/src/SkJSONBench.cpp b/modules/skjson/src/SkJSONBench.cpp
new file mode 100644
index 0000000000..4be3b972ab
--- /dev/null
+++ b/modules/skjson/src/SkJSONBench.cpp
@@ -0,0 +1,167 @@
+/*
+ * Copyright 2018 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include "Benchmark.h"
+#include "SkData.h"
+#include "SkJSON.h"
+#include "SkStream.h"
+
+#if defined(SK_BUILD_FOR_ANDROID)
+static constexpr const char* kBenchFile = "/data/local/tmp/bench.json";
+#else
+static constexpr const char* kBenchFile = "/tmp/bench.json";
+#endif
+
+class JsonBench : public Benchmark {
+public:
+
+protected:
+    const char* onGetName() override { return "json_skjson"; }
+
+    bool isSuitableFor(Backend backend) override { return backend == kNonRendering_Backend; }
+
+    void onPerCanvasPreDraw(SkCanvas*) override {
+        if (auto stream = SkStream::MakeFromFile(kBenchFile)) {
+            SkASSERT(stream->hasLength());
+            fCStringData = SkData::MakeUninitialized(stream->getLength() + 1);
+            auto* data8 = reinterpret_cast<uint8_t*>(fCStringData->writable_data());
+            SkAssertResult(stream->read(data8, stream->getLength()) == stream->getLength());
+            data8[stream->getLength()] = '\0';
+
+        } else {
+            SkDebugf("!! Could not open bench file: %s\n", kBenchFile);
+        }
+    }
+
+    void onPerCanvasPostDraw(SkCanvas*) override {
+        fCStringData = nullptr;
+    }
+
+    void onDraw(int loops, SkCanvas*) override {
+        if (!fCStringData) return;
+
+        for (int i = 0; i < loops; i++) {
+            skjson::DOM dom(static_cast<const char*>(fCStringData->data()));
+            if (dom.root().is<skjson::NullValue>()) {
+                SkDebugf("!! Parsing failed.\n");
+                return;
+            }
+        }
+    }
+
+private:
+    sk_sp<SkData> fCStringData;
+
+    using INHERITED = Benchmark;
+};
+
+DEF_BENCH( return new JsonBench; )
+
+#if !defined(SK_BUILD_FOR_ANDROID_FRAMEWORK)
+
+#include "rapidjson/document.h"
+
+class RapidJsonBench : public Benchmark {
+public:
+
+protected:
+    const char* onGetName() override { return "json_rapidjson"; }
+
+    bool isSuitableFor(Backend backend) override { return backend == kNonRendering_Backend; }
+
+    void onPerCanvasPreDraw(SkCanvas*) override {
+        if (auto stream = SkStream::MakeFromFile(kBenchFile)) {
+            SkASSERT(stream->hasLength());
+            fCStringData = SkData::MakeUninitialized(stream->getLength() + 1);
+            auto* data8 = reinterpret_cast<uint8_t*>(fCStringData->writable_data());
+            SkAssertResult(stream->read(data8, stream->getLength()) == stream->getLength());
+            data8[stream->getLength()] = '\0';
+
+        } else {
+            SkDebugf("!! Could not open bench file: %s\n", kBenchFile);
+        }
+    }
+
+    void onPerCanvasPostDraw(SkCanvas*) override {
+        fCStringData = nullptr;
+    }
+
+    void onDraw(int loops, SkCanvas*) override {
+        if (!fCStringData) return;
+
+        for (int i = 0; i < loops; i++) {
+            rapidjson::Document doc;
+            doc.Parse(static_cast<const char*>(fCStringData->data()));
+            if (doc.HasParseError()) {
+                SkDebugf("!! Parsing failed.\n");
+                return;
+            }
+        }
+    }
+
+private:
+    sk_sp<SkData> fCStringData;
+
+    using INHERITED = Benchmark;
+};
+
+DEF_BENCH( return new RapidJsonBench; )
+
+#endif
+
+#if (0)
+
+#include "pjson.h"
+
+class PJsonBench : public Benchmark {
+public:
+
+protected:
+    const char* onGetName() override { return "json_pjson"; }
+
+    bool isSuitableFor(Backend backend) override { return backend == kNonRendering_Backend; }
+
+    void onPerCanvasPreDraw(SkCanvas*) override {
+        if (auto stream = SkStream::MakeFromFile(kBenchFile)) {
+            SkASSERT(stream->hasLength());
+            fCStringData = SkData::MakeUninitialized(stream->getLength() + 1);
+            auto* data8 = reinterpret_cast<uint8_t*>(fCStringData->writable_data());
+            SkAssertResult(stream->read(data8, stream->getLength()) == stream->getLength());
+            data8[stream->getLength()] = '\0';
+
+        } else {
+            SkDebugf("!! Could not open bench file: %s\n", kBenchFile);
+        }
+    }
+
+    void onPerCanvasPostDraw(SkCanvas*) override {
+        fCStringData = nullptr;
+    }
+
+    void onDraw(int loops, SkCanvas*) override {
+        if (!fCStringData) return;
+
+        for (int i = 0; i < loops; i++) {
+            // Copy needed for in-place operation.
+            auto data = SkData::MakeWithCopy(fCStringData->data(), fCStringData->size());
+            pjson::document doc;
+            if (!doc.deserialize_in_place(static_cast<char*>(data->writable_data()))) {
+                SkDebugf("!! Parsing failed.\n");
+                return;
+            }
+        }
+    }
+
+private:
+    sk_sp<SkData> fCStringData;
+
+    using INHERITED = Benchmark;
+};
+
+DEF_BENCH( return new PJsonBench; )
+
+#endif
-- 
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