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Optimizing the transfer of data between an API and the client is essential for improving the performance and efficiency of your application. By utilizing techniques such as compression and efficient data formats, you can minimize the bandwidth requirements and reduce the latency involved in data transfer.

One popular efficient data format for data transfer is ___. This format allows for compact representation of data, reducing the size of the payload and improving transfer speed.

Another technique to optimize data transfer is using ___. This technique reduces the amount of data transferred by only sending the changes that have occurred since the last update.

By implementing these strategies, you can significantly improve the performance and efficiency of data transfer in your API.