alt Hacker NewsIt’s fascinating to see so many implementations targeting the same thing, along with the crazy variation in runtime size. I’d love to see memory usage comparisons too but I suppose you’d need to establish what you’re actually measuring first.
A few years ago I started work on a kind of abstraction layer that would let you plug Rust code into multiple different engines. Got as far as a proof of concept for JavascriptCore and QuickJS (at the time I had iOS and Android in mind as targets). I still think there’s some value in the idea, to avoid making too heavy a bet on one single JS engine.
I actually captured max RSS size while running benchmarks as a rough approximation, but it's not exposed anywhere. If you go to the repo, you can run `./bench/compare -f rss_mb -lT bench/amd64/*.json` to see a table in the terminal. No big surprises there, Java engines (Rhino, Nashorn, GraalJS) are most memory-hungry.