推荐一个json库 [gojson](github.com/go-fish/gojson)，可以通过命令行工具根据输入的Struct动态生成`MarshalJSON/UnmarshalJSON`方法，性能与EasyJSON、Jsonparser、Jsoniter相比要好很多 ## GoJSON `GoJSON` is a fast and easy package to marshal/unmarshal struct to/from json. You can use `GoJSON` tool to generate marshal/unmarshal code, in benchmark tests, `GoJSON`'s generate code is almost 6~7 times faster than `encoding/json`. ## Example ```golang # install go get -u -v github.com/go-fish/gojson cd ${GOPATH}/src/github.com/go-fish/gojson/cmd go build -o gojson main.go # usage gojson [options] <input dir|file> -inline Use inline function in generate code (default true) -m string Mode of generate, eg: encode, decode, all (default "all") -o string Optional name of the output file to be generated. (default "gojson.generate.go") -unsafe Use decoder without copy data -version Show version information. ``` with -inline && -unsafe, you can get most performance generate code with -m, gojson will generate marshal/unmarshal/both for all expose structs in input dir/file. For expose structs, gojson generate `MarshalJSON/UnmarshalJSON` methods for marshal/unmarshal json. You also can use `gojson.Marshal/gojson.Unmarshal` functions to marshal/unmarshal json. ## Benchmark ### Large Payload #### Unmarshal <table> <tr> <th>gojson</th> <th>114658 ns/op</th> <th>457.72 MB/s</th> <th>5873 B/op</th> <th>253 allocs/op</th> </tr> <tr> <th>jsonparser</th> <th>116647 ns/op</th> <th>449.92 MB/s</th> <th>0 B/op</th> <th>0 allocs/op</th> </tr> <tr> <th>easyjson</th> <th>219673 ns/op</th> <th>238.91 MB/s</th> <th>9264 B/op</th> <th>349 allocs/op</th> </tr> <tr> <th>gojay</th> <th>92398 ns/op</th> <th>567.99 MB/s</th> <th>5985 B/op</th> <th>259 allocs/op</th> </tr> <tr> <th>jsoniter</th> <th>159877 ns/op</th> <th>328.26 MB/s</th> <th>800 B/op</th> <th>29 allocs/op</th> </tr> <tr> <th>encoding/json</th> <th>680867 ns/op</th> <th>377.08 MB/s</th> <th>6154 B/op</th> <th>258 allocs/op</th> </tr> </table> #### Marshal <table> <tr> <th>gojson</th> <th>131 ns/op</th> <th>400511.56 MB/s</th> <th>32 B/op</th> <th>1 allocs/op</th> </tr> <tr> <th>easyjson</th> <th>235 ns/op</th> <th>223039.53 MB/s</th> <th>272 B/op</th> <th>3 allocs/op</th> </tr> <tr> <th>encoding/json</th> <th>597 ns/op</th> <th>87819.16 MB/s</th> <th>120 B/op</th> <th>4 allocs/op</th> </tr> </table> ### Medium Payload #### Unmarshal <table> <tr> <th>gojson</th> <th>4056 ns/op</th> <th>510.51 MB/s</th> <th>240 B/op</th> <th>10 allocs/op</th> </tr> <tr> <th>jsonparser</th> <th>9379 ns/op</th> <th>220.81 MB/s</th> <th>0 B/op</th> <th>0 allocs/op</th> </tr> <tr> <th>easyjson</th> <th>8107 ns/op</th> <th>255.43 MB/s</th> <th>288 B/op</th> <th>11 allocs/op</th> </tr> <tr> <th>gojay</th> <th>5004 ns/op</th> <th>413.84 MB/s</th> <th>2472 B/op</th> <th>10 allocs/op</th> </tr> <tr> <th>jsoniter</th> <th>10579 ns/op</th> <th>195.75 MB/s</th> <th>2576 B/op</th> <th>12 allocs/op</th> </tr> <tr> <th>encoding/json</th> <th>28030 ns/op</th> <th>73.88 MB/s</th> <th>520 B/op</th> <th>15 allocs/op</th> </tr> </table> #### Marshal <table> <tr> <th>gojson</th> <th>105 ns/op</th> <th>19551.00 MB/s</th> <th>32 B/op</th> <th>1 allocs/op</th> </tr> <tr> <th>easyjson</th> <th>193 ns/op</th> <th>10700.99 MB/s</th> <th>272 B/op</th> <th>3 allocs/op</th> </tr> <tr> <th>encoding/json</th> <th>443 ns/op</th> <th>4667.11 MB/s</th> <th>120 B/op</th> <th>4 allocs/op</th> </tr> </table> ### Small Payload #### Unmarshal <table> <tr> <th>gojson</th> <th>812 ns/op</th> <th>176.00 MB/s</th> <th>160 B/op</th> <th>5 allocs/op</th> </tr> <tr> <th>jsonparser</th> <th>925 ns/op</th> <th>154.47 MB/s</th> <th>0 B/op</th> <th>0 allocs/op</th> </tr> <tr> <th>easyjson</th> <th>1209 ns/op</th> <th>118.26 MB/s</th> <th>128 B/op</th> <th>8 allocs/op</th> </tr> <tr> <th>gojay</th> <th>977 ns/op</th> <th>146.30 MB/s</th> <th>304 B/op</th> <th>6 allocs/op</th> </tr> <tr> <th>jsoniter</th> <th>1847 ns/op</th> <th>77.42 MB/s</th> <th>336 B/op</th> <th>7 allocs/op</th> </tr> <tr> <th>encoding/json</th> <th>2576 ns/op</th> <th>55.49 MB/s</th> <th>328 B/op</th> <th>7 allocs/op</th> </tr> </table> #### Marshal <table> <tr> <th>gojson</th> <th>331 ns/op</th> <th>431.90 MB/s</th> <th>32 B/op</th> <th>1 allocs/op</th> </tr> <tr> <th>easyjson</th> <th>439 ns/op</th> <th>325.35 MB/s</th> <th>272 B/op</th> <th>3 allocs/op</th> </tr> <tr> <th>encoding/json</th> <th>1398 ns/op</th> <th>102.22 MB/s</th> <th>120 B/op</th> <th>4 allocs/op</th> </tr> </table> ## Questions Any questions or bugs can go though github issues.