rust_pgn_reader_python_binding 2.5.5

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rust_pgn_reader_python_binding

Fast PGN parsing bindings for Python

This project adds Python bindings to rust-pgn-reader. In addition, it also parses and extracts [%clk ..] and [%eval ..] tags from comments.

Benchmarks

Below are some benchmarks on Lichess's 2013-07 chess games (293,459 games).

Parser	File format	Time
rust-pgn-reader	PGN	1s
rust_pgn_reader_python_binding	PGN	4.7s
rust_pgn_reader_python_binding, parse_game (single_threaded)	parquet	3.3s
rust_pgn_reader_python_binding, parse_games (multithreaded)	parquet	0.5s
chess-library	PGN	2s
python-chess	PGN	3+ min

The main reason for rust_pgn_reader_python_binding being slower (at least in single threaded mode) than rust-pgn-reader is because of vector / string allocations (that show up as malloc's and free's in profiling).

Building

maturin develop maturin develop --release

For a more thorough tutorial, follow https://lukesalamone.github.io/posts/how-to-create-rust-python-bindings/

Profiling

py-spy record -s -F -f speedscope --output profile.speedscope -- python ./src/bench_parquet.py

Linux/WSL-only: py-spy record -s -F -n -f speedscope --output profile.speedscope -- python ./src/bench_parquet.py

Testing

cargo test python -m unittest src/test.py