GSON Serialization very very slow

Question

I\'m trying to serialize an array of 7000 POJO using GSON and the serialization time is extremely slow. It\'s on the order of 3-5 seconds to serialize an array of the following

Answer 1

how about using flat buffers over json.

https://medium.freecodecamp.com/why-consider-flatbuffer-over-json-2e4aa8d4ed07#.d79exjq8n