Download ULTIMATE JSON FREE Unity. 

For test performance you can download Android Benchmark APK(2.2Mb JSON File with 5256 records):
Android_APK_Benchmark

Contact WebSIte:
TachyonWebSite

DESCRIPTION:
Best JSON Serializer/Deserializer on UNITY. Two times faster as the Newtonsoft(NETJson). Based on FastJson.
Android, iOS, Windows, Mac OS, Linux

FEATURES:
– faster JSON Serializer/Deserializer for UNITY;
– simple for use – only import package(not need insert many libraries and files);
– based on FastJSON;
– JSON Indexer API Framework;
– JSON Class Serializer API Framework;
– Support fields names with ‘-‘. Example: property in JSON named as “en-gb”. Field name in class you can name as “Engb”. – Compress Tool for JSON: LZMA and QZIP (for networking);
– Supported UTF8 fields for JSON fields;
– Full source code included;
– Supported and tested on different platforms: Android, iOS, Windows Phone, Windows, Mac OS, Linux.