simplify create_component_match_result

include/ada/url_pattern-inl.h

@@ -31,23 +31,24 @@ inline url_pattern_component_result
 url_pattern_component::create_component_match_result(
     std::string_view input, const std::vector<std::string>& exec_result) {
   // Let result be a new URLPatternComponentResult.
-  auto result = url_pattern_component_result{};
   // Set result["input"] to input.
-  result.input = std::string(input);
   // Let groups be a record<USVString, (USVString or undefined)>.
-  result.groups = {};
+  auto result =
+      url_pattern_component_result{.input = std::string(input), .groups = {}};
+
+  // Optimization: Let's reserve the size.
+  result.groups.reserve(exec_result.size() - 1);
+
   // Let index be 1.
-  size_t index = 1;
   // While index is less than Get(execResult, "length"):
-  while (index < exec_result.size()) {
+  for (size_t index = 1; index < exec_result.size(); index++) {
     // Let name be component’s group name list[index − 1].
-    auto name = group_name_list[index - 1];
     // Let value be Get(execResult, ToString(index)).
-    auto value = exec_result.at(index);
     // Set groups[name] to value.
-    result.groups.insert({name, value});
-    // Increment index by 1.
-    index++;
+    result.groups.insert({
+        .name = group_name_list[index - 1],
+        .value = exec_result.at(index),
+    });
   }
   return result;
 }