⚡️ Speed up function bit_count by 13%
#103
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📄 13% (0.13x) speedup for
bit_countinaerospike_helpers/operations/bitwise_operations.py⏱️ Runtime :
321 microseconds→285 microseconds(best of5runs)📝 Explanation and details
The optimized code achieves a 12% runtime improvement by eliminating repeated module attribute lookups during function execution.
Key Optimization:
The critical change is moving
aerospike.OP_BIT_COUNTfrom being accessed inside the function to being cached as a module-level constant_OP_BIT_COUNT.Why This Improves Performance:
In Python, attribute access (
aerospike.OP_BIT_COUNT) involves a dictionary lookup in the module's namespace on every function call. By performing this lookup once at module initialization and storing the result in_OP_BIT_COUNT, each call tobit_count()uses a direct local variable reference instead of traversing the module attribute chain.The line profiler results confirm this optimization:
Test Results Analysis:
The optimization shows consistent benefits across all test cases:
test_bit_count_empty_bin_name: 37.9% faster)test_large_scale_many_distinct_inputswith 500 iterations: 9.8% faster)Impact:
Since this function is a lightweight wrapper that constructs operation dictionaries for Aerospike database commands, it's likely called frequently in hot paths where operations are batched or looped. The cumulative effect of eliminating attribute lookups becomes significant in high-throughput scenarios. Functions that call
bit_count()repeatedly (like batch operation builders) will see proportional performance improvements without any API changes.✅ Correctness verification report:
⚙️ Click to see Existing Unit Tests
test_bitwise_operations.py::TestBitwiseOperations.test_bit_count_bit_offset_out_of_rangetest_bitwise_operations.py::TestBitwiseOperations.test_bit_count_bit_size_too_largetest_bitwise_operations.py::TestBitwiseOperations.test_bit_count_bit_size_with_offset_too_largetest_bitwise_operations.py::TestBitwiseOperations.test_bit_count_onetest_bitwise_operations.py::TestBitwiseOperations.test_bit_count_random_bit_sizetest_bitwise_operations.py::TestBitwiseOperations.test_bit_count_seven🌀 Click to see Generated Regression Tests
To edit these changes
git checkout codeflash/optimize-bit_count-ml0ipj39and push.