It was years later. V8 shipped in 2008, having been in development for (IIRC) three years. Chakra got its first public preview release in 2010, and shipped in 2

It was years later. V8 shipped in 2008, having been in development for (IIRC) three years. Chakra got its first public preview release in 2010, and shipped in 2011—I strongly suspect it started after V8 first shipped.