Based on the following Manjaro forum entry I would like to report a bug: https://forum.manjaro.org/t/whisker-menu-search-is-slow/124859 The search results appear a lot slower in versions >= 2.4.0 of the plugin xfce4-whiskermenu-plugin, than in previous versions. This behavior I think is very frustrating when you type very fast and have to wait until the results appear. The following two videos posted in the forum compare the responsiveness of version 2.3.5 and 2.4.3: https://anonfile.com/3eY8P9b5o8/xfce4-whiskermenu-plugin_2.3.5-1_mkv https://anonfile.com/t1ZaP7b5o8/xfce4-whiskermenu-plugin_2.4.2-0.1_mkv
The search wasn't actually any slower. In 2.4.0 I switched to using the recommended "search-changed" signal instead "changed" to reduce the amount of searches (https://developer.gnome.org/gtk3/stable/GtkSearchEntry.html). I have already changed the behavior back to what it was before, and that will be in 2.4.4.
thank you very much for your explanation, what the cause was.