JIT compilers like V8 are able to optimize from Object hashmaps to structs, but the problem is that it has trouble figuring out how to group arbitrary object li

JIT compilers like V8 are able to optimize from Object hashmaps to structs, but the problem is that it has trouble figuring out how to group arbitrary object literals into the same bucket in order to get monomorphism guarantees (this is a very common pattern among projects that emit large data structures such as JS parser projects like babel for example) This is partly a reason why virtual dom projects don't expose the ability to replace a virtual dom node constructor with inline literals despite it being a pure deterministic function.