func (d *poolDialer) check(message string, p *redis.Pool, dialed, open int) {
	d.mu.Lock()
	if d.dialed != dialed {
		d.t.Errorf("%s: dialed=%d, want %d", message, d.dialed, dialed)
	}
	if d.open != open {
		d.t.Errorf("%s: open=%d, want %d", message, d.open, open)
	}
	if active := p.ActiveCount(); active != open {
		d.t.Errorf("%s: active=%d, want %d", message, active, open)
	}
	d.mu.Unlock()
}
func startGoroutines(p *redis.Pool, cmd string, args ...interface{}) chan error {
	errs := make(chan error, 10)
	for i := 0; i < cap(errs); i++ {
		go func() {
			c := p.Get()
			_, err := c.Do(cmd, args...)
			errs <- err
			c.Close()
		}()
	}

	// Wait for goroutines to block.
	time.Sleep(time.Second / 4)

	return errs
}
func BenchmarkPoolGet(b *testing.B) {
	b.StopTimer()
	p := redis.Pool{Dial: redis.DialDefaultServer, MaxIdle: 2}
	c := p.Get()
	if err := c.Err(); err != nil {
		b.Fatal(err)
	}
	c.Close()
	defer p.Close()
	b.StartTimer()
	for i := 0; i < b.N; i++ {
		c = p.Get()
		c.Close()
	}
}