This Week in GNOME and Christian Hergert on Sysprof
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This Week in GNOME/Felix Häcker: #107 Reduced Overheads
Update on what happened across the GNOME project in the week from July 28 to August 04.
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Christian Hergert: More Sysprof’ing
GWeather
Last time I wrote we talked about a new search index for
libgweather. In the end I decided to take another route so that we can improve application performance without any changes. Instead, I added a kdtree to do nearest neighbor search when deserializingGWeatherLocation. That code path was looking for the nearest city from a latitude/longitude in degrees.The merge request indexes some 10,000 lat/lon points in radians at startup into a kd-tree. When deserializing it can find nearest city without the need for a linear scan. Maybe this is enough to allow significantly more data into the database someday so my small hometown can be represented.
Nautilus
I found a peculiarity in that I was seeing a lot ofgtk_init()calls while profiling search. That means processes are being spawned. Since I have D-Bus session capture in Sysprof now, I was able to find this being caused by Nautilus sending anorg.freedesktop.DBus.Peer.Ping()RPC tokgxandgnome-disks.