无法释放内存字节缓冲区

3549.93kb 49.73% 49.73%  3549.93kb 49.73%  src/lag_monitor.publishlagmetrictodatadog
     514kb  7.20% 56.93%      514kb  7.20%  bufio.newwritersize
  512.88kb  7.18% 64.11%   512.88kb  7.18%  encoding/pem.decode
  512.69kb  7.18% 71.30%  1536.98kb 21.53%  crypto/x509.parsecertificate
  512.50kb  7.18% 78.48%   512.50kb  7.18%  crypto/x509.(*certpool).addcert

func caller() {
 events := make([]string, 0)
 //....
 PublishLagMetricToDataDog(ctx, strings.Join(events, ","))
}

func PublishLagMetricToDataDog(ctx context.Context, events string) error {
msg := `{
    "series": [%v]
}`
b := []byte(msg)
resp, err := http.Post("https://api.datadoghq.com/api/v1/series?api_key="+env.GetDataDogKey(), "application/json", bytes.NewBuffer(b))
if err != nil {
    logger.Error(ctx, "Error submitting event to datadog, err = ", err)
    return err
}
logger.Info(ctx, resp)
return nil
}

    resp, err := http.Post("https://api.datadoghq.com/api/v1/series?api_key="+env.GetDataDogKey(), "application/json", bytes.NewBuffer(b))
    if err != nil {
        logger.Error(ctx, "Error submitting event to datadog, err = ", err)
        return err
    }
    logger.Info(ctx, resp)
    _ = resp.Body.Close() // <--- Add this
    return nil
}