[vanderZwan]

Thanks. Quick CTRL+F for "inlining" produces:

> Graph generation: Crankshaft builds the Hydrogen control flow graph using the AST, scope info, and type feedback data extracted from the full-compiled code. Inlining also happens at this stage. Hydrogen is Crankshaft's high-level architecture-independent intermediate representation.

> Inlining: Performed during the graph generation phase. The inlining heuristic is very simple: basically, if the function being called is known, and it is safe to inline, the function will be inlined. Large functions (>600 source characters including whitespace or 196 AST nodes) will not be inlined. Cumulatively, a total of 196 AST nodes can be inlined in a single function.

So they do use AST nodes as a heuristic; I don't really understand why they would also use "source characters including whitespace" though.

Guess I better keep my comments outside the function body from now on when possible.