You could say the same about JavaScript: JS is "fast" today, even though the language itself is hilariously inefficient - but browser vendors invested an ungodl

You could say the same about JavaScript: JS is "fast" today, even though the language itself is hilariously inefficient - but browser vendors invested an ungodly amount of work into optimizing their engines, solving all kinds of crazy problems that wouldn't have been there in the first place if the language had been designed differently, until execution is now good enough that you can even use it for high-throughput server-side tasks.