public class SimdJsonTest {

    static final SimdJsonParser SIMD_PARSER = new SimdJsonParser();
    static final ObjectMapper JACKSON = new ObjectMapper();
    static final Gson GSON = new GsonBuilder().create();

    public static void main(String[] args) throws IOException {

        String json = "{\"num\": 2, \"num\": 123}";
        byte[] bytes = json.getBytes();
        JsonValue value = SIMD_PARSER.parse(bytes, bytes.length);

        System.err.println("[simd].size = " + value.getSize());   // 2
        System.err.println("[simd].num = " + value.get("num"));  // 2

        Map jcsObj = JACKSON.readValue(bytes, Map.class);
        System.err.println("[jackson].size = " + jcsObj.size());   // 1
        System.err.println("[jackson].num = " + jcsObj.get("num"));   // 123

        // will throw exception: com.google.gson.JsonSyntaxException: duplicate key: num
        Map gsonObj = GSON.fromJson(new String(bytes), Map.class);
        System.err.println("[gson].size = " + gsonObj.size());
        System.err.println("[gson].num = " + gsonObj.get("num"));
    }
}