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# Conflicts: # uv.lock
# Conflicts: # uv.lock
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Upgrading from Python 3.11 to 3.14 for performance gains on our pure-Python workloads.
Benchmark results (circleci, same runner, 4 runs for Python 3.14)
Results from the benchmarks branch. The PMTiles test acts as a negative control (C++ tool, unaffected by Python version), confirming the CSV gains might be real.
The 4 Python 3.14 runs are consistent: 28.41s, 29.23s, 28.49s, 30.51s (standard deviation of 0.97s).
A single 3.13 run on a different runner showed no improvement over 3.11 — not conclusive given the different setup, but it hints the gains may be specific to 3.14 which is consistent with what we can read on some performance reports.
The speedup could come from Python 3.14's interpreter improvements, which benefit
csv-detectiveanddateparser(pure-Python workloads)?