Description: I experience laggy performance in most recent Impress as observed here: https://ask.libreoffice.org/en/question/261988/libreoffice-calc-70-very-slow/ I can confirm that the delay is related to Open Document formats only. The application seems to be a bit more responsive when changing through slides in the "Notes" view, but lacks massively in "Normal" and Presentation Mode (F5). Files are local (SSD), no network involved running LibreOffice. Regards, sbub Steps to Reproduce: 1. Create a new Impress presentation 2. Add simple slides (no real content required) 3. Store as *.odp 4. Navigate through slides (e.g. via Page-Keys) Actual Results: delay/lag between slide changes around 2-3 seconds Expected Results: no delay between slide changes Reproducible: Always User Profile Reset: Yes Additional Info: Seems to be related to Open Document Format only as: saving the same presentation as *.pptx and then navigating through slides imposes no noticeable delay/lag. Version: 7.1.1.2 / LibreOffice Community Build ID: 10(Build:2) CPU threads: 4; OS: Linux 5.10; UI render: default; VCL: gtk3 Locale: de-DE (de_DE.UTF8); UI: de-DE 7.1.1-1 Calc: threaded
Created attachment 170783 [details] Sample presentation that causes the delay / lag.
Created attachment 170784 [details] Sample presentation as PPTX that does not cause the delay / lag.
The AskLibO link is a red herring. This started happening with version 7.1. Bibisected with linux-64-7.1 to https://git.libreoffice.org/core/commit/bf021c369f2306ee507da9bd3cc4cd10ac5d234c tdf#135500: always use transparent and clear content vdev in impBufferDevice As mentioned in the summary, the lag can be seen simply by switching the slides in the slide pane with PgUp/PgDn. However, you have to have the window maximised to really notice it. I don't observe the lag on Windows. Adding Cc: to Mike Kaganski
Thank you for looking into the issue already. I can confirm that it does not seem to happen on Windows (tested inside a VM). Regarding maximized layout: I am running i3 window manager. I toggled between floating modes and different tiling scenarios, but did not see a real performance improvement. I guess it might still be "maximized" regarding the tiled window container. What I don't understand looking at the bisected code is, why it does perform different when saved in PPTX format. Cheers, sbub
Dear sbub, To make sure we're focusing on the bugs that affect our users today, LibreOffice QA is asking bug reporters and confirmers to retest open, confirmed bugs which have not been touched for over a year. There have been thousands of bug fixes and commits since anyone checked on this bug report. During that time, it's possible that the bug has been fixed, or the details of the problem have changed. We'd really appreciate your help in getting confirmation that the bug is still present. If you have time, please do the following: Test to see if the bug is still present with the latest version of LibreOffice from https://www.libreoffice.org/download/ If the bug is present, please leave a comment that includes the information from Help - About LibreOffice. If the bug is NOT present, please set the bug's Status field to RESOLVED-WORKSFORME and leave a comment that includes the information from Help - About LibreOffice. Please DO NOT Update the version field Reply via email (please reply directly on the bug tracker) Set the bug's Status field to RESOLVED - FIXED (this status has a particular meaning that is not appropriate in this case) If you want to do more to help you can test to see if your issue is a REGRESSION. To do so: 1. Download and install oldest version of LibreOffice (usually 3.3 unless your bug pertains to a feature added after 3.3) from https://downloadarchive.documentfoundation.org/libreoffice/old/ 2. Test your bug 3. Leave a comment with your results. 4a. If the bug was present with 3.3 - set version to 'inherited from OOo'; 4b. If the bug was not present in 3.3 - add 'regression' to keyword Feel free to come ask questions or to say hello in our QA chat: https://web.libera.chat/?settings=#libreoffice-qa Thank you for helping us make LibreOffice even better for everyone! Warm Regards, QA Team MassPing-UntouchedBug
Delay is not exact science, so we may experience it differently. I see some delay in LO 7.3 and 7.4 but not in 7.5 or 24.2. So I close. Should someone test it otherwise, please explain.
I don't notice any lag anymore Arch Linux 64-bit, X11 Version: 7.6.2.1 (X86_64) / LibreOffice Community Build ID: 60(Build:1) CPU threads: 8; OS: Linux 6.5; UI render: default; VCL: kf5 (cairo+xcb) Locale: fi-FI (fi_FI.UTF-8); UI: en-US 7.6.2-3 Calc: threaded