Reducing Zod's Memory Footprint by an Order of Magnitude with Method Memoization

2026-09-07

Zod 4.5 cuts schema memory use by creating bound methods only when they are first accessed instead of attaching dozens of closures to every instance. A bare z.string() now retains 784 bytes instead of 7.5 KB, with 2× to nearly 10× reductions across the benchmarked schema types.