https://github.com/ghadishayban/clojure/tree/invokedynamic A branch with some usages of invokedynamic in the compiler. all tests pass and is binary compatible with current release

vars used as expressions are indified, so are keywords, and keyword invoke sites (:foo thing)

bytecode is >=1.8 only

Still need to do protocol invokes (relatively straightforward) and lazy var loading (hard)

performance should be identical to current release

@ghadi If performance is "identical", could you summarize the other benefits for this, in a sentence or two?

It's setting the stage for improvements

At least there are no regressions... I suspect keyword invokes are a lot faster

But haven't measured them specifically

I'm solving for startup time

Ah, cool. Thanks.

You should run your production API with that branch 😃

@seancorfield

I have more interesting things locally, but the above changes are what I'll show to Rich, probably after the 1.9 cycle

Heh, I’m happy to have 1.9.0 Alpha 13 in production but I’ll stick to official Clojure/core builds 🙂

(I kid. But in all honesty I did stick to very conservative changes. If you had a handy benchmark harness by all means...)

To be clear, will mostly affect startup time of aot code (so not your typical repl)