update — deep immutable patch — benchmark

benchmarks / data operations / update-deep

Data operations

update — deep immutable patch

Surgical immutable update of a nested object (no Proxy).

update — deep immutable patchlower is better · pnpm bench:update

Surgical immutable update of a nested object (no Proxy).

Reproduce it

pnpm bench:update

Clone the repository, install with pnpm, and run the command above. mitata prints avg times and heap per operation; results land in bench/results (gitignored).

Benchmark results with environment Node 22.17.1, AMD Ryzen 7 5800H
Suite	Implementation	Avg time	Heap/op
update — deep immutable patch	jit	18.41 ns	120 b
update — deep immutable patch	immer	2.22 µs	3.49 KB

mitata · Node 22.17.1 · linux-x64 · AMD Ryzen 7 5800H · captured 2026-07-11Zod 4.4.3 · TypeBox 0.34 · typia 12 · fast-json-stringify 7