Since which version of NodeJS is Crankshaft enabled by default?

(I think this question needs no body.)

v0.3.2 was the first to bundle V8 3.0.x, all versions after that had Crankshaft enabled on ia32 (but not on x64 or arm).

Versions v0.3.2 - v0.3.7 come with V8 3.0.x. Crankshaft enabled only on ia32.

Versions v0.3.8 - v0.5.0 come with V8 3.1.x. Crankshaft enabled only on ia32.

v0.5.1 was the first to bundle V8 3.4.x: Crankshaft enabled on all architectures (ia32, x64, arm).

(Actually it was enabled since V8 3.2.0 but there was no node.js version that bundled it.)