[csjh]

Optimizations like these are so cool. I love seeing higher level languages take advantage of their high level-ness

[joshsegall]

Agreed. There's quite a bit of room for optimization if your language design allows for it. Plus you have flexibility to make different tradeoffs as computer architectures and the cost of various operations change over time.

[fsckboy]

you can do this in C, you just need to let its low level-ness be at the same level as everything else you do, just a setjmp longerjmp