TS type system is virtually identical to PHP - structurally typed, union types, etc. I don't know why people think PHP is untyped - it's not 5.4 anymore. The type system is very full featured.

The difference is TS has to be compiled, PHP doesn't. If we have to compile stuff we might as well use a more safe language like C#.

Also no, Node is not fast. I don't know why people think Node/JS is fast. JS has very poor performance characteristics and it can't be fixed because it's a factor of the language design - although, PHP has similar problems.

Chromium is very optimized, for specific scenarios. Its still a dynamically typed, garbage collected language - and optimizing a for loop in a play pretend medium blog doesn't change that.