New submission from Antoine Pitrou <pit...@free.fr>: This patch optimizes scanning for the max character width in an unicode buffer.
Micro-benchmarking some worst case situations: $ ./python -m timeit -s "x='é'+'x'*100000" "x[1:]" -> before: 10000 loops, best of 3: 74.9 usec per loop -> after: 100000 loops, best of 3: 15.5 usec per loop $ ./python -m timeit -s "x='\U00010000'+'x'*100000" "x[1:]" -> before: 10000 loops, best of 3: 138 usec per loop -> after: 10000 loops, best of 3: 71.3 usec per loop ---------- components: Interpreter Core files: find_max_char.patch keywords: patch messages: 145372 nosy: pitrou priority: normal severity: normal status: open title: Optimize finding the max character width type: performance versions: Python 3.3 Added file: http://bugs.python.org/file23379/find_max_char.patch _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue13155> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
