It is nonsensical to consider memory leaks as reported by Valgrind on a program that uses Glib. It allocates and builds a whole context system and never frees it regularly, which confuses Valgrind. I am pretty certain almost all 'leaks' come from there. libglib should be put in Valgrind suppression file.

It was a very bad choice to choose a program based on Glib for this kind of experiment.