Almost every engine on this page is C or C++ compiled to WebAssembly so it can run in a browser. Lozza is not. It is written directly in JavaScript, and it runs as JavaScript.
That is a significant handicap — it gives up a lot of raw speed relative to compiled code — and Lozza is nonetheless a perfectly respectable engine that will beat the overwhelming majority of club players. It is a genuinely impressive piece of work and a good demonstration of how much is achievable in a language nobody would choose for this.
It is also the lightest engine bundled here by a wide margin, which makes it the most reliable choice on older phones and low-powered machines.
What makes it distinctive
- ▸Pure JavaScript — no WebAssembly, no compilation step
- ▸By far the smallest and fastest to load
- ▸MIT licensed, unlike the GPL engines alongside it