1//
2// Benchmark.cpp
3//
4// This sample shows a benchmark of the JSON parser.
5//
6// Copyright (c) 2012, Applied Informatics Software Engineering GmbH.
7// and Contributors.
8//
9// SPDX-License-Identifier: BSL-1.0
10//
11
12
13#include "Poco/JSON/Parser.h"
14#include "Poco/JSON/ParseHandler.h"
15#include "Poco/JSON/JSONException.h"
16#include "Poco/Environment.h"
17#include "Poco/Path.h"
18#include "Poco/File.h"
19#include "Poco/FileStream.h"
20#include "Poco/StreamCopier.h"
21#include "Poco/Stopwatch.h"
22#include <iostream>
23#include <iomanip>
24
25
26int main(int argc, char** argv)
27{
28 Poco::Stopwatch sw;
29
30 std::string dir = Poco::Environment::get("POCO_BASE") + "/JSON/samples/Benchmark/";
31 Poco::Path filePath(dir, "input.big.json");
32
33 std::ostringstream ostr;
34
35 if (filePath.isFile())
36 {
37 Poco::File inputFile(filePath);
38 if ( inputFile.exists() )
39 {
40 sw.start();
41 Poco::FileInputStream fis(filePath.toString());
42 Poco::StreamCopier::copyStream(fis, ostr);
43 sw.stop();
44 }
45 else
46 {
47 std::cout << filePath.toString() << " doesn't exist!" << std::endl;
48 return 1;
49 }
50 }
51
52 std::cout << "JSON Benchmark" << std::endl;
53 std::cout << "==============" << std::endl;
54
55 std::string jsonStr = ostr.str();
56 std::cout << "Total of " << jsonStr.size() << " bytes," << std::endl << "loaded in " << sw.elapsed() << " [us]," << std::endl;
57
58 std::cout << std::endl << "POCO JSON barebone parse" << std::endl;
59 Poco::JSON::Parser sparser(0);
60 sw.restart();
61 sparser.parse(jsonStr);
62 sw.stop();
63 std::cout << "---------------------------------" << std::endl;
64 std::cout << "[std::string] parsed in " << sw.elapsed() << " [us]" << std::endl;
65 std::cout << "---------------------------------" << std::endl;
66
67 Poco::JSON::Parser iparser(0);
68 std::istringstream istr(jsonStr);
69 sw.restart();
70 iparser.parse(istr);
71 sw.stop();
72 std::cout << "----------------------------------------" << std::endl;
73 std::cout << "[std::istringstream] parsed in " << sw.elapsed() << " [us]" << std::endl;
74 std::cout << "----------------------------------------" << std::endl;
75
76 std::cout << std::endl << "POCO JSON Handle/Stringify" << std::endl;
77 try
78 {
79 Poco::JSON::Parser sparser;
80 sw.restart();
81 sparser.parse(jsonStr);
82 Poco::DynamicAny result = sparser.result();
83 sw.stop();
84 std::cout << "-----------------------------------------" << std::endl;
85 std::cout << "[std::string] parsed/handled in " << sw.elapsed() << " [us]" << std::endl;
86 std::cout << "-----------------------------------------" << std::endl;
87
88 Poco::JSON::Parser isparser;
89 std::istringstream istr(jsonStr);
90 sw.restart();
91 isparser.parse(istr);
92 result = isparser.result();
93 sw.stop();
94 std::cout << "------------------------------------------------" << std::endl;
95 std::cout << "[std::istringstream] parsed/handled in " << sw.elapsed() << " [us]" << std::endl;
96 std::cout << "------------------------------------------------" << std::endl;
97
98 //Serialize to string
99 Poco::JSON::Object::Ptr obj;
100 if (result.type() == typeid(Poco::JSON::Object::Ptr))
101 obj = result.extract<Poco::JSON::Object::Ptr>();
102
103 std::ostringstream out;
104 sw.restart();
105 obj->stringify(out);
106 sw.stop();
107 std::cout << "-----------------------------------" << std::endl;
108 std::cout << "stringified in " << sw.elapsed() << " [us]" << std::endl;
109 std::cout << "-----------------------------------" << std::endl;
110 std::cout << std::endl;
111 }
112 catch(Poco::JSON::JSONException jsone)
113 {
114 std::cout << jsone.message() << std::endl;
115 }
116
117 return 0;
118}
119