TachysHigh-Performance Virtual DOM

A lightweight virtual DOM library optimized for V8, with a React-compatible API.

Tiny Footprint

~11 KB gzipped core with object pooling, bitwise flags, and zero-allocation hot paths. Lean entry points (sync, sync-core) drop further.

React-Compatible API

Full hooks API (useState, useEffect, useMemo, use, useSyncExternalStore, etc.), memo, forwardRef, Suspense, lazy, ErrorBoundary, and React 19 use() hook.

Server-Side Rendering

renderToString, renderToStringAsync, renderToReadableStream with streaming Suspense, and Suspense-aware hydration with selective hydration.

Concurrent Scheduler

Three-lane scheduler (Sync, Default, Transition) with fiber-style mid-render yield, two-phase commit for Transitions, and abandonment rollback.