The second-to-last slide ends with:

"ideally, a language should be designed so that an optimizing compiler can describe its optimizations in the source language. Of course!"

and

"The programmer using such a system will write his beautifully-structured, but possibly inefficient, program P; then he will interactively specify transformations that make it efficient. Such a system will be much more powerful and reliable than a completely automatic one."

Which I find to be a much more agreeable conclusion than

"everybody should write in-line assembly for inner-loops"