> Dart - obviously a way to create a two-tier web with Chrome being the only option for performance. The performance of the generated JavaScript is okay. Typic

> Dart - obviously a way to create a two-tier web with Chrome being the only option for performance. The performance of the generated JavaScript is okay. Typically, it's somewhere around 75% of the performance of handwritten JavaScript and it's still getting better. Those -25% may sound like a big deal, but it's comparable to the performance from JS engines from last year.