[fulafel]

The gains from the advanced optimizations mode under discussion there are nice and the setup is known to be a little finicky wrt dependencies. But it's opt in and rarely necessary.

[Scarbutt]

Unless you want to ship a 5MB browser bundle for a 'hello world', advanced compilation is not necessary, is obligatory.

[fulafel]

It's like 200 kB gzipped for hello world with simple optimizations.

When you use webpack, you can use that ecosystem of space optimizers too.