encoding

Example: encoding

Examples in this folder demonstrate how to use third-party packages for JSON decoding and encoding.

tidwall/gjson

The github.com/tidwall/gjson package allows an easy access to JSON properties, without parsing the payload into a data structure, and is therefore convenient when accessing only selected parts of the response.

var json = `{"foo":{"bar":"BAZ"}}`
fmt.Println(gjson.Get(json, "foo.bar"))
// => BAZ

The gjson.go example displays data from the Cluster Stats API.

go run gjson.go

mailru/easyjson

The github.com/mailru/easyjson package uses code generation to provide fast encoding and decoding of struct types.

The easyjson.go example uses custom types for representing simpleArticle documents and index and search responses, including error responses.

make clean setup
go run easyjson.go

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Benchmarks

Both mailru/easyjson and tidwall/gjson provide significant performance gains in different scenarios.

You can run the included benchmarks by executing the make bench command; example output below.

BenchmarkSearchResults/json           30000	     45679 ns/op	    8456 B/op	      60 allocs/op
BenchmarkSearchResults/easyjson      100000	     15612 ns/op	    7992 B/op	      52 allocs/op
BenchmarkClusterStats/json_-_map      20000	     96808 ns/op	   31971 B/op	     391 allocs/op
BenchmarkClusterStats/json_-_struct   30000	     59046 ns/op	   15048 B/op	      17 allocs/op
BenchmarkClusterStats/gjson         1000000	      2119 ns/op	     264 B/op	       3 allocs/op