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You are tasked with optimizing a Snowpark application that processes sensor data'. The data includes timestamp, sensor ID, and sensor reading. Your initial implementation uses a regular Python UDF to calculate the moving average for each sensor. However, the processing time is significantly slow due to the large volume of data'. Which of the following strategies would be MOST effective in improving the performance of this calculation using vectorization?
Correct Answer: B
Converting the Python UDF to a vectorized UDF allows it to process data in batches (as Pandas Series), which significantly reduces the overhead of transferring data between Snowflake and the UDE While increasing warehouse size (C) can provide some performance gain, vectorization (B) directly addresses the inefficiency of processing individual rows. Using built-in aggregation (D) is also a good option if feasible, but if a custom moving average calculation is required, vectorized UDF is the best fit. SQL UDFs aren't always faster and don't inherently vectorize. Java UDFs may provide some improvement but are more complex to implement than vectorized Python UDFs.