https://bugs.documentfoundation.org/show_bug.cgi?id=95241
--- Comment #4 from Luke Kendall <l...@zeta.org.au> --- Well, I don't know if this is related or not: let me know if I should submit it as a separate bug... I opened up two files - both large, about 120,000 words long. One is my novel, which LO edits in quite a snappy fashion (let's call this MS). The other is basically the same, but with a very large number of comments from a professional editor (let's call this MS-ed): LO clearly has some kind of O(N^2) algorithm when it comes to handling comments, since it struggles horribly to edit this file. (Both are in .odt format.) Anyway, that's just context background. I opened MS, no problem, and MS-ed. I clicked in the scroll region below the scroll-thumb in MS-ed to jump down a page (since scrolling using the mouse wheel is very laggy - it can take a minute for LO to finish its painfully slow and staggering scrolling). What happened was that LO never stopped scrolling. "top" shows it was using over 99% CPU. I couldn't get X11 to let me change window focus - I had to use Alt-tab to get to a Terminal. Nor did the mouse scroll wheel work while LO was madly scrolling. In the end I attached to the process in gdb, got a backtrace, and killed the LO process. As soon as I did so, X11 mouse events started working correctly again. I restarted LO, and almost the same thing happened: one mouse click in the scroll region, and LO scrolled page by page by page by page... I tried to drag the scroll thumb back up to stop it, then releaed the mouse. No mouse events were accepted elsewhere (e.g. I couldn't change focus using the mouse), but after about a minute the scrolling stopped and the system started responding to mouse events normally. I don't dare use the mouse to scroll, though. I can use Page-up/down safely (each page-scroll takes about 5 secs to complete). This is on an Intel NUC (AMD x64) with 16GB RAM. With LO running but not doing any editing: top - 16:17:43 up 91 days, 19:53, 14 users, load average: 0.50, 0.75, 0.82 Tasks: 267 total, 3 running, 263 sleeping, 0 stopped, 1 zombie %Cpu(s): 12.8 us, 0.6 sy, 0.0 ni, 86.6 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st KiB Mem: 16101596 total, 13980472 used, 2121124 free, 2462616 buffers KiB Swap: 9820156 total, 1089084 used, 8731072 free. 4949980 cached Mem PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 29840 luke 20 0 3548172 1.821g 47576 S 48.8 11.9 1066:09 firefox 3221 luke 20 0 687556 25736 5800 S 2.3 0.2 30:54.65 gnome-term+ 1762 root 20 0 733288 337232 203572 S 1.3 2.1 2097:51 Xorg 2977 luke 20 0 410924 4128 2484 S 1.0 0.0 1471:33 indicator-+ ... -- You are receiving this mail because: You are the assignee for the bug.
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