There is also this (https://github.com/mbbill/Silverfir https://github.com/mbbill/Silverfir) and Wizard (https://github.com/titzer/wizard-engine https://github.

There is also this (https://github.com/mbbill/Silverfir https://github.com/mbbill/Silverfir) and Wizard (https://github.com/titzer/wizard-engine https://github.com/titzer/wizard-engine). I wrote a paper about Wizard's in-place interpreter and benchmarked lots of runtimes in (https://dl.acm.org/doi/abs/10.1145/3563311 https://dl.acm.org/doi/abs/10.1145/3563311). As there seem to be even more runtimes popping up (great job with wasmi, btw), it seems like a fun, maybe even full-time, job to keep up with them all.