https://gcc.gnu.org/bugzilla/show_bug.cgi?id=118032
--- Comment #34 from Mark Wielaard <mark at gcc dot gnu.org> --- After r15-6598-g668cad04b16fc044142474232ac072fcc5f94433 ("tree-switch-conversion: don't apply switch size limit on jump tables") the build speeds up considerably: https://builder.sourceware.org/buildbot/#/builders/310/builds/787 make -j64: 1h:31m make check -j64: 1h:28m total: 3h:08m (The extra few minutes come from checkout, setup, etc.) This is a considerable speedup, even compared to about a month ago. On December 11 a full build took ~4 hours.