Really depends on what you're doing. The performance benchmark on Dart's site shows some of the strengths of Dart. There are other areas that are weak. See t

Really depends on what you're doing. The performance benchmark on Dart's site shows some of the strengths of Dart. There are other areas that are weak. See the Computer Language Benchmark Game[0]. A lot of those tests rely on fast i/o handling (be it a file or stdin/stdout). Also being able to work with large data structures and manipulate them in various ways. Dart does decent on some tests but fails on others. Also, all of the implementations are submitted by users, so there may be faster ways to do things, but it at least gives you an idea. [0] http://benchmarksgame.alioth.debian.org/u32/benchmark.php?test=all&lang=dart&lang2=v8&data=u32 http://benchmarksgame.alioth.debian.org/u32/benchmark.php?te...