I recently stumbled on an announcement for Graal and Truffle in my bookmarks: https://blog.plan99.net/graal-truffle-134d8f28fb69 https://blog.plan99.net/graal-

I recently stumbled on an announcement for Graal and Truffle in my bookmarks: https://blog.plan99.net/graal-truffle-134d8f28fb69 https://blog.plan99.net/graal-truffle-134d8f28fb69 discussed at https://news.ycombinator.com/item?id=13343845 https://news.ycombinator.com/item?id=13343845 The idea there: "Graal is a research compiler. ... Truffle is a framework for implementing languages using nothing more than a simple abstract syntax tree interpreter." As a bonus, you get high speed, good instrumentation for debugging and profiling, with great garbage collection, and hotswap code as you develop.