A couple of changes have been made that could have made this longer. Perhaps link times have gone up now that we're collecting profiles from multiple processes? It also looks like we're now linking the gtest libxul during MOZ_PROFILE_USE, which is a regression from before and could take some extra time. Before we get too far investigating the build time though... aren't intending these jobs to use 3-tier by now?
Bug 1562612 Comment 1 Edit History
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A couple of changes have been made that could have made this longer. Perhaps link times have gone up now that we're collecting profiles from multiple processes? It also looks like we're now linking the gtest libxul during MOZ_PROFILE_GENERATE, which is a regression from before and could take some extra time. Before we get too far investigating the build time though... aren't intending these jobs to use 3-tier by now?