Ant is a new JavaScript runtime built from scratch on its own engine called Ant Silver — not a wrapper around V8, JSC, or SpiderMonkey. It ships as a single 9.1 MB binary, runs npm packages and TypeScript natively without a build step, and claims near-V8 performance with a 5.4 ms cold start. Key features include a VM-isolated sandbox using KVM/Hypervisor.framework for running untrusted code, built-in Wasm support, a Node-compatible API, WinterTC conformance, and a package installer claimed to be up to 40x faster than npm. It also ships with its own package registry at ants.land that speaks the npm protocol.

2m read timeFrom antjs.org
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By the numbersCold startInstall packages, fastFrom zero to a serverTypeScript, no build stepRun code you don’t trustA registry for the ecosystemInstall
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