Paulo Matos on Mythryl: “In March I wrote about JSSE: a JavaScript engine an agent built from…”

In March I wrote about JSSE: a JavaScript engine an agent built from scratch. It was fast to build, slow to run. So I asked the agent to optimize it. No bytecode, no JIT, just constant factors. #javascript #engine #jsse #agentic #coding p.ocmatos.com/blog/how-fas...

p.ocmatos.comHow fast do you want it? - Notes & CodeSeven weeks of agentic optimization on JSSE. 4.73x faster on test262 wall time, 1.92x JetStream geometric mean, half the cost of building the engine in the first place.

7/5/26, 6:43 pm0 reposts2 likes

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