npm run build npm run bench For me: Macbook Air M1
base x 16,671 ops/sec ±1.52% (85 runs sampled) makeObservable x 35.58 ops/sec ±3.32% (50 runs sampled) legacy-decorators x 30.85 ops/sec ±4.35% (57 runs sampled) decorators x 53.88 ops/sec ±2.98% (71 runs sampled) Fastest except base: decorators