New submission from Giampaolo Rodola' <g.rod...@gmail.com>:
This is a follow up of issue33639 (zero-copy via sendfile()) and issue26828 (os.copy_file_range()). On [Linux 4.5 / glib 2.27] shutil.copyfile() will use os.copy_file_range() instead of os.sendfile(). According to my benchmarks performances are the same but when dealing with NFS copy_file_range() is supposed to attempt doing a server-side copy, meaning there will be no exchange of data between client and server, making the copy operation an order of magnitude faster. Before proceeding unit-tests for big-file support should be added first (issue37096). We didn't hit the 3.8 deadline but I actually prefer to land this in 3.9 as I want to experiment with it a bit (copy_file_range() is quite new, issue26828 is still a WIP). ---------- components: Library (Lib) files: patch.diff keywords: patch messages: 344671 nosy: giampaolo.rodola priority: normal severity: normal status: open title: Have shutil.copyfile() use copy_file_range() type: performance versions: Python 3.9 Added file: https://bugs.python.org/file48392/patch.diff _______________________________________ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue37159> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
