docs: add Python 3.15 to README version badge

[not-matthias]

The README badge listed Python 3.9–3.14, while pyproject.toml classifiers and the CI matrix already include 3.15. This adds 3.15 to the badge.

[codspeed]

Merging this PR will improve performance by 1.57%

⚠️ 6 benchmarks spent significant time in system calls

System calls cannot be consistently instrumented, so they are not included in the measure, which understates the real cost. Please switch to the Walltime instrument to accurately measure system calls.

Measurement and system calls

• test_n_queens_solve[board0]
• test_generate_all_permutations[sequence0]
• test_generate_all_subsequences[sequence0]
• test_generate_all_permutations[sequence1]
• test_recursive_cached_fibo_100
• test_generate_all_subsequences[sequence1]

ℹ️ 48 benchmarks have no flame graph

The flamegraph could not be generated because we failed to resolve the symbols in the profiling trace. This happens when we fail to harvest information about language frames.

• test_multiprocessing_map[10]
• test_multiprocessing_map[100000]
• test_multiprocessing_map[10000]
• test_multiprocessing_map[1000]
• test_multiprocessing_map[100]
• test_threadpool_map[10000]
• test_threadpool_map[100000]
• test_sleep[0.05]
• test_sleep[0.01]
• test_pipe_communication[10]
• …and 38 more

⚠️ Different runtime environments detected

Some benchmarks with significant performance changes were compared across different runtime environments,
which may affect the accuracy of the results.

Open the report in CodSpeed to investigate

⚡ 6 improved benchmarks
❌ 8 (👁 8) regressed benchmarks
✅ 263 untouched benchmarks

Performance Changes

	Mode	Benchmark	BASE	HEAD	Efficiency
⚡	WallTime	test_multiprocessing_map[1000]	59.4 ms	49.1 ms	+20.97%
⚡	WallTime	test_sum_of_squares[sum_of_squares_sum_comprehension_power]	253.6 µs	222.6 µs	+13.91%
⚡	WallTime	test_make_lowshelf	7.9 µs	7.3 µs	+8.57%
⚡	WallTime	test_tcp_connection[1.1.1.1-53]	888.5 µs	819.7 µs	+8.38%
👁	WallTime	test_generate_all_combinations[5-4]	10.2 µs	10.8 µs	-5%
👁	WallTime	test_multiprocessing_map[10000]	56 ms	60 ms	-6.74%
👁	WallTime	test_noop_lambda_decorated	1.2 µs	1.3 µs	-7.6%
👁	WallTime	test_get_valid_pos[pos0-4]	2.7 µs	2.9 µs	-5.11%
👁	WallTime	test_multiprocessing_map[100000]	314.4 ms	339.6 ms	-7.43%
👁	WallTime	test_noop_pass	493.7 ns	563.3 ns	-12.36%
👁 ℹ️	Memory	test_multiprocessing_map[10]	2.9 MB	3.1 MB	-6.38%
👁 ℹ️	Memory	test_multiprocessing_map[100000]	6.5 MB	5.5 MB	+17.52%
👁 ℹ️	Memory	test_multiprocessing_map[10000]	3.3 MB	2.7 MB	+20.56%
👁 ℹ️	Memory	test_multiprocessing_map[1000]	2.7 MB	3 MB	-8.24%

Tip

Curious why performance improved? Comment @codspeedbot explain why performance improved on this PR, or directly use the CodSpeed MCP with your agent.

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_{Comparing cod-3838-support-cpython-315 (e1b7c44) with master (40ad6e6)}

[greptile-apps]

Confidence Score: 5/5

[Low impact] This documentation-only change appears safe to merge.

Summary

Updated the README.md Python badge to include Python 3.15.

• The README Python badge now includes Python 3.15.

_{Reviews (1) · Last reviewed commit: "docs: add python 3.15 to README version ..." · Reviewed by Greptile}

[lvaroqui]

LGTM