Codec | Schema Benchmarks

Some schema libraries support two way conversion of data, often referred to as "encoding" and "decoding".

We benchmark the time taken to encode and decode a Date to and from a string (usually an ISO 8601 string, but we don't enforce this).

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import * as z from "zod";

const dateFromString = z.codec(z.iso.datetime(), z.date(), {
  encode: (date) => date.toISOString(),
  decode: (str) => new Date(str),
});

dateFromString.encode(new Date(0)); // "1970-01-01T00:00:00.000Z"
dateFromString.decode("1970-01-01T00:00:00.000Z"); // Date

Invalid data

We don't benchmark codecs with invalid data, as many libraries require the input to be correctly typed before passing it to the codec.

Optimizations

None JIT Precompiled

Library	Version	Downloads (/wk)	Optimizations
`zod/mini`	`4.3.6`	132.2M	JIT	963 ns	582 ns
`zod`	`4.3.6`	132.2M	JIT	958 ns	576 ns
`typebox`	`1.1.18`	229.4K	JIT	5 μs	4 μs
`io-ts`	`2.2.22`	2.61M	None	562 ns	298 ns
`effect@beta`	`4.0.0-beta.43`	8.47M	None	1 μs	711 ns
`effect@beta` (unknown)	`4.0.0-beta.43`	8.47M	None	1 μs	687 ns
`effect`	`3.21.0`	8.47M	None	1 μs	868 ns
`effect` (unknown)	`3.21.0`	8.47M	None	1 μs	851 ns

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