This summarizes my impression of the article. It reads like a freshman CS TA giving a "well, akshually" speech. This is all old news- everyone knows vtables are

This summarizes my impression of the article. It reads like a freshman CS TA giving a "well, akshually" speech. This is all old news- everyone knows vtables are "slow" in some very loose sense of the term. In general, these optimizations don't make a big enough difference to be worth considering while designing your code. In very particular domains, these ideas are valid, but a lot of that code is written in C so there's no dynamic dispatch anyway.