var lastPort int
		for _, allocatedPort := range op.allocated {
			if allocatedPort > lastPort {
				lastPort = allocatedPort
			}
		}
		if len(op.allocated) == 0 {
			lastPort = 32768
		}

		// Try to find the next non allocated port.
		// If too many ports are full, just reuse one,
		// since this is just a dummy value.
		for port := lastPort + 1; port < 100; port++ {

// BenchmarkDispatch/As-8                     	 8212087	       145.3 ns/op
// BenchmarkDispatch/Visit-8                  	 8926146	       135.3 ns/op
func BenchmarkDispatch(b *testing.B) {
	vs := []Value{
		Int64Value(32768),
		Uint64Value(0xfacecafe),
		StringValue("anything"),
		BoolValue(true),
		Float64Value(1.2345),
		DurationValue(time.Second),
		AnyValue(b),
	}
	var (
		ii int64
		s  string
		bb bool
		u  uint64

	"io"
	"math/rand"
	"net"
	. "os"
	"strconv"
	"syscall"
	"testing"
	"time"
)

func TestSendFile(t *testing.T) {
	sizes := []int{
		1,
		42,
		1025,
		syscall.Getpagesize() + 1,
		32769,
	}
	t.Run("sendfile-to-unix", func(t *testing.T) {
		for _, size := range sizes {
			t.Run(strconv.Itoa(size), func(t *testing.T) {
				testSendFile(t, "unix", int64(size))
			})
		}
	})

          },
          {
              "name": "admin",
              "admin_layer": {}
          }
      ]
  },
  "bootstrap_extensions": [
    {
      "name": "envoy.bootstrap.internal_listener",

          },
          {
              "name": "admin",
              "admin_layer": {}
          }
      ]
  },
  "bootstrap_extensions": [
    {
      "name": "envoy.bootstrap.internal_listener",

          },
          {
              "name": "admin",
              "admin_layer": {}
          }
      ]
  },
  "bootstrap_extensions": [
    {
      "name": "envoy.bootstrap.internal_listener",

          },
          {
              "name": "admin",
              "admin_layer": {}
          }
      ]
  },
  "bootstrap_extensions": [
    {
      "name": "envoy.bootstrap.internal_listener",

          },
          {
              "name": "admin",
              "admin_layer": {}
          }
      ]
  },
  "bootstrap_extensions": [
    {
      "name": "envoy.bootstrap.internal_listener",

          },
          {
              "name": "admin",
              "admin_layer": {}
          }
      ]
  },
  "bootstrap_extensions": [
    {
      "name": "envoy.bootstrap.internal_listener",

          },
          {
              "name": "admin",
              "admin_layer": {}
          }
      ]
  },
  "bootstrap_extensions": [
    {
      "name": "envoy.bootstrap.internal_listener",