After the work to support 16384 columns in LibreOffice Calc I have also made sure that the feature works also in Collabora Online, thanks to the funding of NGI. This project has received funding from the European Union’s Horizon 2020 resear…
The VLOOKUP spreadsheet function by default requires the searched data to be sorted, and in that case it performs a fast binary search. If the data is not sorted (for example if it would be impractical to have the data that way), it is poss…
So I enabled support for up to 16384 columns in Calc by default some time ago, but just getting it to work was not necessarily the end of the work. Making Calc have 16 times more columns means that any operation that works on entire columns…
So I've been working on improving LO text layout performance, as specified by the TDF tender. As it says, text layout in LO can be rather slow, because of problems like repeated text layout calls for the same text. Let's have a look at a pe…
So I've updated my Clang to the newly released version 14, and while doing the LibreOffice rebuild afterwards I noticed that it seemed to build faster. I didn't measure it, but the build finished sooner than I expected. So of course I've me…
Last couple of weeks I have been working on the 16k columns support in Calc. There's been a lot of work on this already by Noel and others, but so far this has been hidden behind the experimental option, and normally documents open only wit…
Have you ever edited a document in LibreOffice in more than one window? Right, neither have I. Who'd think about LibreOffice and more than one user at the same time, right? Except ... somebody did and that's how collaborative editing based
In other words, how much faster will a compiler be after it's been built with various optimizations? Given the recent Clang12 release, I've decided to update my local build of Clang11 that I've been using for building LibreOffice. I switche…
With Clang12 almost released, I guess it's high time to write a conclusion to the Clang11 changes that improve compilation times with PCHs. I originally planned to do this after the Clang11 release, but with the process to get the changes r…
Great post and thanks for taking the time to write the patch! I really hope this problem gets fixed soon. I did a blog post on Chromium build times a few days ago where I discuss the problems with .pch files. If you ever want another test c…
> "Now, in case there seems to be something fishy about the graphs, the last graph indeed isn't from MSVC (after all, its reporting options are as "useful" as -ftime-report). It is from Clang. I still know how to do performance magic ..."Pl…