Well to defend Google a bit, all performance advice is implementation specific. Whether it be knowing how CPU pipelines and cache lines work or knowing the inte

Well to defend Google a bit, all performance advice is implementation specific. Whether it be knowing how CPU pipelines and cache lines work or knowing the internals of the JS engine. Heck, anytime you have a design that leaves design decisions to implementors, you're leaving performance on the table. Today's modern web seems like a race to re-implement an OS on top of an existing OS, badly.