Here's benchmarks for PyTuple_FromArray() PR:

$ python -m perf timeit -s "l = [None]*0; tuple_ = tuple" "tuple_(l)" --duplicate=100 --compare-to=../cpython-master/venv/bin/python  
/home/sergey/tmp/cpython-master/venv/bin/python: ..................... 50.5 ns +- 1.0 ns
/home/sergey/tmp/cpython-dev/venv/bin/python: ..................... 45.6 ns +- 1.2 ns
Mean +- std dev: [/home/sergey/tmp/cpython-master/venv/bin/python] 50.5 ns +- 1.0 ns -> [/home/sergey/tmp/cpython-dev/venv/bin/python] 45.6 ns +- 1.2 ns: 1.11x faster (-10%)

$ python -m perf timeit -s "l = [None]*1; tuple_ = tuple" "tuple_(l)" --duplicate=100 --compare-to=../cpython-master/venv/bin/python
/home/sergey/tmp/cpython-master/venv/bin/python: ..................... 61.8 ns +- 1.1 ns
/home/sergey/tmp/cpython-dev/venv/bin/python: ..................... 54.8 ns +- 0.8 ns
Mean +- std dev: [/home/sergey/tmp/cpython-master/venv/bin/python] 61.8 ns +- 1.1 ns -> [/home/sergey/tmp/cpython-dev/venv/bin/python] 54.8 ns +- 0.8 ns: 1.13x faster (-11%)

$ python -m perf timeit -s "l = [None]*5; tuple_ = tuple" "tuple_(l)" --duplicate=100 --compare-to=../cpython-master/venv/bin/python
/home/sergey/tmp/cpython-master/venv/bin/python: ..................... 68.2 ns +- 1.3 ns
/home/sergey/tmp/cpython-dev/venv/bin/python: ..................... 61.8 ns +- 1.5 ns
Mean +- std dev: [/home/sergey/tmp/cpython-master/venv/bin/python] 68.2 ns +- 1.3 ns -> [/home/sergey/tmp/cpython-dev/venv/bin/python] 61.8 ns +- 1.5 ns: 1.10x faster (-9%)

$ python -m perf timeit -s "l = [None]*10; tuple_ = tuple" "tuple_(l)" --duplicate=100 --compare-to=../cpython-master/venv/bin/python
/home/sergey/tmp/cpython-master/venv/bin/python: ..................... 88.1 ns +- 2.3 ns
/home/sergey/tmp/cpython-dev/venv/bin/python: ..................... 78.9 ns +- 3.1 ns
Mean +- std dev: [/home/sergey/tmp/cpython-master/venv/bin/python] 88.1 ns +- 2.3 ns -> [/home/sergey/tmp/cpython-dev/venv/bin/python] 78.9 ns +- 3.1 ns: 1.12x faster (-10%)

$ python -m perf timeit -s "l = [None]*100; tuple_ = tuple" "tuple_(l)" --duplicate=100 --compare-to=../cpython-master/venv/bin/python
/home/sergey/tmp/cpython-master/venv/bin/python: ..................... 477 ns +- 7 ns
/home/sergey/tmp/cpython-dev/venv/bin/python: ..................... 452 ns +- 6 ns
Mean +- std dev: [/home/sergey/tmp/cpython-master/venv/bin/python] 477 ns +- 7 ns -> [/home/sergey/tmp/cpython-dev/venv/bin/python] 452 ns +- 6 ns: 1.05x faster (-5%)