Performance is pretty good if you consider starting and running small scripts. There is an interesting feature of compiling a js file into a C array bytecode so

Performance is pretty good if you consider starting and running small scripts. There is an interesting feature of compiling a js file into a C array bytecode so your runtime code could load that directly skipping the parsing step. For a long running orlarge JS code something like Spidermonkey or V8 with their JITs might be faster. But they are not as embedding friendly and their code bases are much larger.