1 files changed, 187 insertions, 0 deletions
diff --git a/benchmark/json_parser.cpp b/benchmark/json_parser.cpp
new file mode 100644
index 0000000..509c9b8
--- /dev/null
+++ b/benchmark/json_parser.cpp
@@ -0,0 +1,187 @@
+
+#include <orcus/stream.hpp>
+#include <orcus/json_parser.hpp>
+#include <orcus/json_parser_thread.hpp>
+#include <orcus/string_pool.hpp>
+
+#include <vector>
+#include <iostream>
+#include <stdio.h>
+#include <string>
+#include <sys/time.h>
+
+#define SIMULATE_PROCESSING_OVERHEAD 0
+
+using namespace std;
+using namespace orcus;
+
+namespace {
+
+class stack_printer
+{
+public:
+    explicit stack_printer(const char* msg) :
+        m_msg(msg)
+    {
+        fprintf(stdout, "%s: --begin\n", m_msg.c_str());
+        m_start_time = get_time();
+    }
+
+    ~stack_printer()
+    {
+        double end_time = get_time();
+        fprintf(stdout, "%s: --end (duration: %g sec)\n", m_msg.c_str(), (end_time-m_start_time));
+    }
+
+private:
+    double get_time() const
+    {
+        timeval tv;
+        gettimeofday(&tv, NULL);
+        return tv.tv_sec + tv.tv_usec / 1000000.0;
+    }
+
+    ::std::string m_msg;
+    double m_start_time;
+};
+
+}
+
+class handler
+{
+    string_pool m_pool;
+    json::parse_tokens_t m_tokens;
+    std::vector<double> m_results;
+
+    void do_work()
+    {
+#if SIMULATE_PROCESSING_OVERHEAD
+        double f = m_results.empty() ? 0.0 : m_results.back();
+
+        for (size_t i = 0; i < 1000; ++i)
+            f += 0.1;
+
+        m_results.push_back(f);
+#endif
+    }
+
+public:
+    void begin_parse()
+    {
+        m_tokens.emplace_back(json::parse_token_t::begin_parse);
+        do_work();
+    }
+
+    void end_parse()
+    {
+        m_tokens.emplace_back(json::parse_token_t::end_parse);
+        do_work();
+    }
+
+    void begin_array()
+    {
+        m_tokens.emplace_back(json::parse_token_t::begin_array);
+        do_work();
+    }
+
+    void end_array()
+    {
+        m_tokens.emplace_back(json::parse_token_t::end_array);
+        do_work();
+    }
+
+    void begin_object()
+    {
+        m_tokens.emplace_back(json::parse_token_t::begin_object);
+        do_work();
+    }
+
+    void object_key(std::string_view s, bool transient)
+    {
+        if (transient)
+            s = m_pool.intern(s).first;
+
+        m_tokens.emplace_back(json::parse_token_t::object_key, s);
+        do_work();
+    }
+
+    void end_object()
+    {
+        m_tokens.emplace_back(json::parse_token_t::end_object);
+        do_work();
+    }
+
+    void boolean_true()
+    {
+        m_tokens.emplace_back(json::parse_token_t::boolean_true);
+        do_work();
+    }
+
+    void boolean_false()
+    {
+        m_tokens.emplace_back(json::parse_token_t::boolean_false);
+        do_work();
+    }
+
+    void null()
+    {
+        m_tokens.emplace_back(json::parse_token_t::null);
+        do_work();
+    }
+
+    void string(std::string_view s, bool transient)
+    {
+        if (transient)
+            s = m_pool.intern(s).first;
+
+        m_tokens.emplace_back(json::parse_token_t::string, s);
+        do_work();
+    }
+
+    void number(double val)
+    {
+        m_tokens.emplace_back(val);
+        do_work();
+    }
+
+    size_t token_size() const
+    {
+        return m_tokens.size();
+    }
+
+    double work_value() const
+    {
+        return m_results.back();
+    }
+};
+
+int main(int argc, char** argv) try
+{
+    if (argc < 2)
+        return EXIT_FAILURE;
+
+    const char* filepath = argv[1];
+    orcus::file_content content(filepath);
+
+    cout << "file: " << filepath << endl;
+
+    handler hdl;
+
+    {
+        stack_printer __stack_printer__("parsing");
+        orcus::json_parser<handler> parser(content.str(), hdl);
+        parser.parse();
+    }
+
+    cout << "parsed token count: " << hdl.token_size() << endl;
+#if SIMULATE_PROCESSING_OVERHEAD
+    cout << "work value: " << hdl.work_value() << endl;
+#endif
+
+    return EXIT_SUCCESS;
+}
+catch (const std::exception& e)
+{
+    cerr << e.what() << endl;
+    return EXIT_FAILURE;
+}