feat(utils): Accelerate data generation by 168x using NumPy#1
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raphaelgimenezneto wants to merge 1 commit into
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feat(utils): Accelerate data generation by 168x using NumPy#1raphaelgimenezneto wants to merge 1 commit into
raphaelgimenezneto wants to merge 1 commit into
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Hello!
This PR introduces a high-performance, vectorized implementation for the generate_historical_rides function, resulting in a ~168x speedup in the simulation's data setup phase.
The Problem: Identifying the Bottleneck
Using cProfile, I identified that the original generate_historical_rides function was the most significant bottleneck, consuming over 10 seconds of execution time. This was primarily due to its iterative, loop-based approach for generating a large number of records.
Profiler Output (Before):

The Solution: Vectorization with NumPy
The solution was to replace the iterative method with NumPy vectorization. Instead of processing records one-by-one, this approach operates on entire arrays of data at once, leveraging NumPy's highly optimized C backend for maximum efficiency.
The Results: Performance Gain & Validation
The new implementation is 168.29x faster, reducing the execution time from 10.68 seconds to just 0.06 seconds.
More importantly, this speed was achieved without sacrificing correctness. A comprehensive statistical validation suite confirms that the new function produces a dataset that is statistically equivalent to the original, preserving all key patterns like rush hour distribution and hotspot logic.
Benchmark & Validation Results:

Profiler Output (After):

As a result, generate_historical_rides no longer appears as a major bottleneck in the profiler output.
Changes in this Pull Request
This PR serves as a practical case study in applying HPC principles to scientific Python code.