"With Warp we have replaced the frontend (the MIR building phase) of the IonMonkey JIT. The next step is removing the old code and architecture. This will likely happen in Firefox 85. We expect additional performance and memory usage improvements from that."
Interesting I wonder how does it compared to Safari on Speedometer.
I wonder if there's room to have a fork of Node that uses SpiderMonkey as a "back-end" in place of V8? It would be cool to introduce competition in that space. I don't know how tightly-coupled Node currently is to V8 (compared to other adherents of the JS standard).
Mozilla worked on this a while ago with SpiderNode but it is no longer maintained. It was actually based on Microsoft's work to do the same thing with ChakraCore.
Interesting I wonder how does it compared to Safari on Speedometer.
Edit: Firefox 83 - 71 Safari 14 - 77