負荷テストツールのvegetaをインストールする

> ./go get -u  github.com/tsenart/vegeta       
go: go.mod file not found in current directory or any parent directory.
        'go get' is no longer supported outside a module.
        To build and install a command, use 'go install' with a version,
        like 'go install example.com/cmd@latest'
        For more information, see https://golang.org/doc/go-get-install-deprecation
        or run 'go help get' or 'go help install'.

> go install github.com/tsenart/vegeta@latest

 echo  'GET http://localhost:38081/' |vegeta attack -duration=1s |vegeta report
2022/07/12 00:30:25 encode: can't detect encoding of "stdin"

echo "GET http://localhost:38081/"|vegeta attack -duration=1s -output result2.bin
vegeta report -type=json result2.bin
{"latencies":{"total":133301700,"mean":2666034,"50th":2515050,"95th":5193200,"99th":9292000,"max":9292000},"bytes_in":{"total":3350,"mean":67},"bytes_out":{"total":0,"mean":0},"earliest":"2022-07-12T00:38:53.8787855+09:00","latest":"2022-07-12T00:38:54.8613487+09:00","end":"2022-07-12T00:38:54.8638598+09:00","duration":982563200,"wait":2511100,"requests":50,"rate":50.88731187978544,"throughput":50.75759259986785,"success":1,"status_codes":{"200":50},"errors":[]}