How you properly profiling V2Ray's performance

loophole.json

{
  "inbounds": [
    {
      "port": 5200,
      "listen": "127.0.0.1",
      "protocol": "dokodemo-door",
      "settings": {
        "address": "127.0.0.1",
        "port": 5201,
        "network": "tcp",
        "timeout": 0,
        "followRedirect": false,
        "userLevel": 0
      },
      "tag": "iperf-in"
    },
    {
      "port": 10086,
      "protocol": "vmess",
      "settings": {
        "clients": [
          {
            "id": "23ad6b10-8d1a-40f7-8ad0-e3e35cd38297",
            "security": "auto",
            "alterId": 0
          }
        ]
      },
      "tag": "vmess-out"
    }
  ],
  "outbounds": [
    {
      "protocol": "freedom",
      "settings": {},
      "tag": "vmess-out"
    },
    {
      "protocol": "vmess",
      "settings": {
        "vnext": [
          {
            "address": "127.0.0.1",
            "port": 10086,
            "users": [
              {
                "id": "23ad6b10-8d1a-40f7-8ad0-e3e35cd38297",
                "alterId": 0,
                "security": "auto",
                "level": 0
              }
            ]
          }
        ]
      },
      "tag": "iperf-in"
    }
  ]
}