Run the Web.
What is V8?
written in C++ and used in Google Chrome, the open source browser from Google. It implements ECMAScript as specified in ECMA-262, 3rd edition, and runs on Windows XP and Vista, Mac OS X 10.5+, and Linux systems that use IA-32, ARM or MIPS processors.
V8 can run standalone, or can be embedded into any C++ application.
How do I start?
To see just how fast V8 is, look at the benchmarks.