Downloading and parsing large JSON files

I was wondering what is most efficient (not wasting memory) and fastest way to download a JSON file and parse it.

I looked into the json.Decoder but are they any other solutions out there?

Thanks in advance.

Assuming your JSON file is large because it contains long list of objects, you do something like this:

https://golang.org/pkg/encoding/json/#example_Decoder_Decode_stream

Basically you you find the beginning of the array using the streaming API and then use json.Decoder to decode the array elements one by one.

There are a number of third-party JSON decoders, with various trade-offs: https://github.com/pquerna/ffjson , https://github.com/mailru/easyjson , but I would benchmark first to determine that json.Decoder isn't performing well enough before switching to one of them.