Rust Forth
This was a short project of mine to create a basic implementation of Forth in Rust as a learning exercise. It is able to handle a fair number of forth "words" and is fairly fast and performant. There is clearly performance, memory, maintainability, and correctness left on the table, which I may fix at a later date.
I was pleasantly surprised at how straightforward it was to build out the initial interpreter. In the future, this may be a helpful example project to practice optimizing interpreters/compilers.
My goal was to beat the Gforth implementation for the fizzbuzz program on my local machine. The Gforth implementation is able to handle about 30MiB/s as measured via ./gforth benchmark.forth | pv > /dev/null.
My implementation (while implementing significantly fewer features) is able to achieve around 50MiB/s as measured via ./forth ../../test_files/benchmark.forth | pv > /dev/null.
One of the primary ways I was able to achieve this is by aggressively inlining function calls. More work is needed for this to maintain program correctness, but the basic implementation is working.