Ant JavaScript Runtime Launches: 8.6 MB Binary, 5.4 ms Cold Start, Built-In VM Sandbox
Tags Developer Tools · OSS · Infrastructure · Security
Ant is a new JavaScript runtime built on the Ant Silver engine with an 8.6 MB binary that cold-starts in 5.4 ms — 2.4x faster than Bun and 5.7x faster than Node. It installs packages up to 40x faster than npm via its ants.land registry (npm-protocol compatible), runs TypeScript without a build step, and ships a hardware-isolated VM sandbox (KVM/Hypervisor.framework) for running untrusted code with read-only mounts and deny-by-default networking.
Technical significance
Ant's combination of sub-10ms cold starts, zero-config TypeScript execution, and hardware-level sandboxing addresses three pain points simultaneously: serverless cold-start latency, developer friction with build steps, and safe execution of untrusted code. The npm-compatible registry means existing packages work without migration. If the sandbox matures, it could become the default for AI agent tool-use and plugin systems.