test262 is a conformance test and as such mostly runs small test-snippets once to verify, what counts here is setup, parsing and first-run execution. While V8

test262 is a conformance test and as such mostly runs small test-snippets once to verify, what counts here is setup, parsing and first-run execution. While V8 has added a fast first-stage interpreter there are probably a ton of other overheads when starting a V8 context as well as "inefficiencies" related to preparing code for later JIT optimizations. So for more CPU intensive code written in JS where the JIT activates the tables shifts radically, compare QuickJS with V8 (JIT-less) and V8 (JIT) on benchmarks, particularly Raytrace, Crypto and NavierStokes that should be pushing the computation performance. https://bellard.org/quickjs/bench.html https://bellard.org/quickjs/bench.html