trace

type TimeSpan struct {
	Start time.Time
	Done  time.Time
}

type TraceContext struct {
	DNS     TimeSpan
	DNSName string // DNSName is populated after "dns_start" event
	DNSErr  error  // DNSErr is populated after "dns_done" event

	TLSHandshake TimeSpan
	TLSConnState *tls.ConnectionState // TLSConnState is populated after "tls_handshake_done" event
	TLSErr       error                // TLSErr is populated after "tls_handshake_done" event

	Connect        TimeSpan
	ConnectAddress string
	ConnectErr     error

	Total     time.Duration // from start to PutIdleConn
	FirstByte time.Duration // from start to GotFirstResponseByte

	OnEvent func(ctx *TraceContext, event string)
	// contains filtered or unexported fields
}