Indeed, the flame chart can't tell you that. The solution provided in the article seems to rip out `Metadata::Cache::getVarsByName` entirely. If it were easy t

Indeed, the flame chart can't tell you that. The solution provided in the article seems to rip out `Metadata::Cache::getVarsByName` entirely. If it were easy to optimise `Metadata::Cache::getVarsByName` instead, then that would also have been a suitable optimisation. I guess domain knowledge and experience let them know which optimisation was more suitable here.