func putRecordBatch(svc *firehose.Firehose, channel string, data []byte, total, batch int) { ts := time.Now() for i := 0; i < total/batch; i++ { var records []*firehose.Record for j := 0; j < batch; j++ { records = append(records, &firehose.Record{Data: data}) } params := &firehose.PutRecordBatchInput{ DeliveryStreamName: aws.String(channel), Records: records, } svc.PutRecordBatch(params) } duration := float64(time.Since(ts)) / float64(time.Millisecond) //log.Printf("Pushed a total of %d (msg size %d) in batch of %d in %fms", total, len(data), batch, duration) fmt.Printf("%d,%d,%d,%f\n", total, len(data), batch, duration) }