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I think that a slow JIT is problematic in any application except for non-interactive numerical calculations. For example in a GUI software or in a server applic
by fsh 6y ago
I think that a slow JIT is problematic in any application except for non-interactive numerical calculations. For example in a GUI software or in a server application it would be very undesirable to have each function run a million times slower the first time it gets called.
- sgt101 6y agoFor GUI's I don't see this as an issue - JITs run alot faster than humans. All of Javascript is on a JIT - and thats the dominant UI for now! For servers generally you find that users are all calling the same function so it's very rare that you hit a blip - much more commonly users get performance problems from something else in the stack like the network or the client, and while Javascript is the dominant front end the dominant back end for servers is Java and that's got a JIT as well.
- jpsamaroo 6y agoJavaScript's JIT is a tracing JIT, so it can compile code in the background while the interpreter/less optimized compiled code is actually running. In Julia, the compiler runs first, and then the compiled code is run. This will probably eventually change as Julia's compiler improves, but regardless, it's important to note this distinction.
- pjmlp 6y agoIt can make use of JIT caches (if it doesn't already), not every JIT compiler starts from zero.