New submission from STINNER Victor: Given the following snippet:
with open("x", "w+", encoding="utf-8") as fp: pass Creating the TextIOWrapper object requires many syscall: see the issue #30228. But I also noticed that *closing* such object also requires multiple lseek() syscalls, whereas the snippet doesn't read nor write anything. Attached PR avoids lseek() if read and write buffers are empty. ---------- components: IO messages: 292749 nosy: haypo, pitrou, serhiy.storchaka priority: normal severity: normal status: open title: Closing a BufferedRandom calls lseek() mutliple times type: performance versions: Python 3.7 _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue30229> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com