“So what we’re doing in our 2nd generation engine is to combine the best elements of both approaches:
We’re using some chunks of the WebKit JS engine and building a full-method JIT to execute JavaScript code. This should get us fast baseline JS performance like the other engines. And most important, it will be consistent – no more jumping on and off trace and spending a huge amount of time in interpreted code.
We’ll be bolting our tracing engine into the back of that machine code to generate super-fast code for inner loops. This means that we’ll be able to still have the advantages of a tracing engine with the consistency of the method-based JIT.
This work is still in the super-early stages, to the point where it’s not even worth demoing, but we thought it would be worth posting about so people understand the basics of what’s going on.”
