It's a scripting language, so it's not going to compete with anything compiled or JITed, but it has a pretty efficient threaded bytecode interpreter (that is almost more interesting than the language itself!). It's certainly good enough for most situations where you would reach for a scripting language.
In my tests, it's 5-10x Python for long running things (about 30% slower than Fennel on LuaJit) but for small things, because you can easily shift work to compile time, it beats normal Go: https://codeberg.org/veqq/verse-reader#performance