4902b8137b
Performance tweak for samples/display, resulting in a much faster application start, particularly when built in debug mode, when Windows messages are dumped to the system debug channel for inspection/diagnosis. Speed up the Append() loop below by foregoing the repeated resizing of the choice drop-down via repeated calls to GetBestSize() which happens deep inside the Append() call chain and executes another inner loop calling SendMessage() to get the control contents. (This exhibits 1/2*O(N^2) behaviour thanks to the linear growth of the length of the inner loop to the length of the outer loop (= number of items to add), while it is re-executed for every new added item.) With the 'display' sample, that's about 500+ rounds and about 500*500/2 SendMessage() calls less now on my dev/test rig, taking noticeable time to start the display application. --- Issue was found due to the barrage of '(winmsg)' Windows Message debug log lines zipping by in the monitor app when the sample was build in Debug Mode. Only significant difference with the Release Build is those debug lines being output, hence the performance gain is less, but still measurable, in a Release build. When the machine is otherwise severely loaded (UI render core maxing out), "measurable" becomes "obnoxiously noticeable" again on Win10/64. Closes #22049.
About
wxWidgets is a free and open source cross-platform C++ framework for writing advanced GUI applications using native controls.
wxWidgets allows you to write native-looking GUI applications for all the major desktop platforms and also helps with abstracting the differences in the non-GUI aspects between them. It is free for the use in both open source and commercial applications, comes with the full, easy to read and modify, source and extensive documentation and a collection of more than a hundred examples. You can learn more about wxWidgets at https://www.wxwidgets.org/ and read its documentation online at https://docs.wxwidgets.org/
Platforms
This version of wxWidgets supports the following primary platforms:
- Windows XP, Vista, 7, 8 and 10 (32/64 bits).
- Most Unix variants using the GTK+ toolkit (version 2.6 or newer or 3.x).
- macOS (10.10 or newer) using Cocoa under both amd64 and ARM platforms.
Most popular C++ compilers are supported including but not limited to:
- Microsoft Visual C++ 2005 or later (up to 2022).
- g++ 4 or later, including MinGW/MinGW-64/TDM under Windows.
- Clang under macOS and Linux.
- Intel icc compiler.
- Oracle (ex-Sun) CC.
Licence
wxWidgets licence is a modified version of LGPL explicitly allowing not distributing the sources of an application using the library even in the case of static linking.
Building
For building the library, please see platform-specific documentation under
docs/<port> directory, e.g. here are the instructions for
wxGTK, wxMSW and
wxOSX.
If you're building the sources checked out from Git, and not from a released version, please see these additional Git-specific notes.
Further information
If you are looking for community support, you can get it from
- Mailing Lists
- Discussion Forums
- #wxwidgets IRC channel
- Stack Overflow
(tag your questions with
wxwidgets) - And you can report bugs at GitHub
Commercial support is also available.
Finally, keep in mind that wxWidgets is an open source project collaboratively developed by its users and your contributions to it are always welcome. Please check our guidelines if you'd like to do it.
Have fun!
The wxWidgets Team.