add benchmark

examples/quickstart/quickstart.cpp

@@ -1,10 +1,14 @@
 #include "simdjson.h"
-#include <iostream>
-#include <vector>
+#include <benchmark/benchmark.h>
+#include <chrono>
+#include <ratio>
 
-int main(void) {
-  simdjson::dom::parser parser;
+simdjson::dom::parser parser;
+simdjson::dom::element parsed_json;
 
+simdjson::simdjson_result<std::vector<simdjson::dom::element>> result;
+
+static void DoSetup(const benchmark::State &state) {
   simdjson::padded_string json_string = R"(
   {
     "firstName": "John",
@@ -35,49 +39,81 @@ int main(void) {
     ]
   })"_padded;
 
-  // simdjson::dom::element tweets = parser.load("twitter.json");
-  // std::cout << tweets["search_metadata"]["count"] << " results." <<
-  // std::endl;
-
-
-
-  simdjson::dom::element parsed_json = parser.parse(json_string);
-  // std::cout << parsed_json["firstName"] << std::endl;
+  parsed_json = parser.parse(json_string);
+}
 
+void wildcard_dot_top_level_elements() {
   // selects all the top level elements
   auto result = parsed_json.at_path_with_wildcard("$.*");
-
-  // selects all the top level elements
-  // auto result = parsed_json.at_path_with_wildcard("$[*]");
-
-  // selects all address properties - $.address.*
-  // auto result = parsed_json.at_path_with_wildcard("$.address.*");
-
-  // selects all address properties - $["address"].*
-  // auto result = parsed_json.at_path_with_wildcard("$['address'].*");
-
-  // selects all phoneNumbers properties - $.phoneNumbers.*
-  // auto result = parsed_json.at_path_with_wildcard("$.phoneNumbers.*");
-
-  // selects nested properties - $.*.streetAddress
-  // auto result = parsed_json.at_path_with_wildcard("$.*.streetAddress");
-
-  std::vector<simdjson::dom::element> values = result.value();
-
-  std::string string_result;
-
-  string_result = "[";
-  for (int i = 0; i < values.size(); ++i) {
-    simdjson::internal::string_builder<> sb;
-    sb.append(values[i]);
-    string_result = string_result +=
-        std::string(i == 0 ? "" : ",") + "\n\t" + std::string(sb.str());
-  }
-  string_result += "\n]";
-
-  std::cout << string_result << std::endl;
-
-  // trying to figure out how printing arrays are handled
-  // auto result = parsed_json["phoneNumbers"];
-  // std::cout << result << std::endl;
+}
+
+void wildcard_bracket_top_level_elements() {
+  // selects all the top level elements
+  auto result = parsed_json.at_path_with_wildcard("$[*]");
+}
+
+void wildcard_dot_element_properties_address() {
+  // selects all address properties - $.address.*
+  auto result = parsed_json.at_path_with_wildcard("$.address.*");
+}
+
+void wildcard_bracket_element_properties_address() {
+  // selects all address properties - $["address"].*
+  auto result = parsed_json.at_path_with_wildcard("$['address'].*");
+}
+void wildcard_dot_element_properties_phoneNumbers() {
+  // selects all phoneNumbers properties - $.phoneNumbers.*
+  auto result = parsed_json.at_path_with_wildcard("$.phoneNumbers.*");
+}
+
+void wildcard_bracket_element_nested_properties_streetAddress() {
+  // selects nested properties - $.*.streetAddress
+  auto result = parsed_json.at_path_with_wildcard("$.*.streetAddress");
+}
+
+static void BM_json_path_with_wildcard(benchmark::State &state, Func func) {
+  int microseconds = state.range(0);
+
+  std::chrono::duration<double, std::micro> sleep_duration{
+      static_cast<double>(microseconds)};
+
+  for (auto _ : state) {
+    auto start = std::chrono::high_resolution_clock::now();
+
+    func();
+    std::vector<simdjson::dom::element> values = result.value();
+
+    std::string string_result;
+    string_result = "[";
+    for (int i = 0; i < values.size(); ++i) {
+      simdjson::internal::string_builder<> sb;
+      sb.append(values[i]);
+      string_result = string_result +=
+          std::string(i == 0 ? "" : ",") + "\n\t" + std::string(sb.str());
+    }
+    string_result += "\n]";
+    std::cout << string_result << std::endl;
+
+    auto end = std::chrono::high_resolution_clock::now();
+
+    auto elapsed_seconds =
+        std::chrono::duration_cast<std::chrono::duration<double>>(end - start);
+
+    state.SetIterationTime(elapsed_seconds.count());
+  }
+}
+
+BENCHMARK_CAPTURE(BM_json_path_with_wildcard, wildcard_dot_top_level_elements_test, &wildcard_dot_top_level_elements);
+
+BENCHMARK_CAPTURE(BM_json_path_with_wildcard, wildcard_bracket_top_level_elements_test, &wildcard_bracket_top_level_elements);
+
+BENCHMARK_CAPTURE(BM_json_path_with_wildcard, wildcard_dot_element_properties_address_test, &wildcard_dot_element_properties_address);
+
+BENCHMARK_CAPTURE(BM_json_path_with_wildcard, wildcard_bracket_element_properties_address_test, &wildcard_bracket_element_properties_address);
+
+BENCHMARK_CAPTURE(BM_json_path_with_wildcard, wildcard_dot_element_properties_phoneNumbers_test, &wildcard_dot_element_properties_phoneNumbers);
+
+BENCHMARK_CAPTURE(BM_json_path_with_wildcard, wildcard_bracket_element_nested_properties_streetAddress_test, &wildcard_bracket_element_nested_properties_streetAddress);
+
+BENCHMARK_MAIN();
 }