Is anyone aware of any efforts to get clang/rustc to use lli to speed up iteration times? My thought is you lower everything to llvm bytecode first but skip all the codegen/linking. Then you can codegen or run interpreted. Might help make debug builds much faster to get to execution. Probably could trivially parallelize the background compilation & auto-build in the background on every file change to get the best of all worlds (most code gen is ready, the remainder is executable & will get compiled as needed). If you can do it with live substitution (which I think is what lli does) then you'd progressively get a faster program.