crates.io · crates:memchr

memchr active

Provides extremely fast (uses SIMD on x86_64, aarch64 and wasm32) routines for 1, 2 or 3 byte search and single substring search.

Latest stable version	2.8.3
Published	2026-07-08 00:49:54 UTC
Install	`cargo add memchr`
Minimum Rust version (rust-version)	`Rust ≥ 1.61`
License	Unlicense OR MIT
Advisories on latest version	none known
Last verified	2026-10-08 19:48:38 UTC
Sources	api.osv.dev, crates.io

Maintenance

Activity	active
Last stable release	2026-07-08 00:49:54 UTC · 92 days ago
Stable releases in the last 12 months	4
Published versions	47

Heuristic based only on release dates; it does not measure issue or security response times.

Version history

Version	Published
`2.8.3`	2026-07-08 00:49:54 UTC
`2.8.2`	2026-06-12 02:16:37 UTC
`2.8.1`	2026-05-27 02:27:01 UTC
`2.8.0`	2026-02-06 19:39:00 UTC
`2.7.6`	2025-09-25 12:47:49 UTC
`2.7.5`	2025-06-11 13:30:22 UTC
`2.7.4`	2024-06-14 00:17:06 UTC
`2.7.3`	2024-06-13 16:13:19 UTC
`2.7.2`	2024-03-27 20:35:08 UTC
`2.7.1`	2023-12-28 22:02:47 UTC
`2.7.0`	2023-12-28 21:57:22 UTC
`2.6.4`	2023-10-01 16:54:27 UTC
`2.6.3`	2023-09-02 18:40:27 UTC
`2.6.2`	2023-08-30 13:27:50 UTC
`2.6.1`	2023-08-29 14:54:29 UTC
`2.6.0`	2023-08-28 15:37:48 UTC
`2.5.0`	2022-04-30 17:29:35 UTC
`2.4.1`	2021-08-18 13:33:58 UTC
`2.4.0`	2021-04-30 23:24:14 UTC
`2.3.4`	2020-10-28 21:16:27 UTC

Showing the 20 most recent of 47 versions. JSON

Version compatibility

Newest stable version that declares support for each runtime version (from the requirements published with each version).

Runtime	Newest compatible version
`rust 1.63`	`2.8.3`
`rust 1.70`	`2.8.3`
`rust 1.75`	`2.8.3`
`rust 1.80`	`2.8.3`
`rust 1.85`	`2.8.3`
`rust 1.90`	`2.8.3`

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Frequently asked questions

What is the latest version of memchr?

The latest stable version of memchr is 2.8.3, published on 2026-07-08. Verified by Vigia on 2026-10-08.

How do I install the latest version of memchr?

Run cargo add memchr. The latest stable version is 2.8.3 (verified 2026-10-08).

Is memchr deprecated?

No. memchr is not marked as deprecated in the registry.

Which Rust version does memchr require?

memchr 2.8.3 declares this requirement: Rust ≥ 1.61.

Does memchr 2.8.3 have known vulnerabilities?

No known advisories affect memchr 2.8.3 according to the data Vigia checks.

Is memchr still maintained?

memchr published 4 stable releases in the last 12 months; the most recent was 92 days ago. Activity: active.

Observed changes

No changes observed yet since Vigia started tracking this package.

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