# MobX 6.12.0

- Product: MobX (https://whatsnew.fyi/product/mobx)
- Vendor: MobX
- Date: 2023-11-27
- Version: 6.12.0
- Original notes: https://github.com/mobxjs/mobx/releases/tag/mobx%406.12.0
- Permalink: https://whatsnew.fyi/product/mobx/releases/6.12.0

What's New is an index, not a publisher: every entry below links to the vendor's own release notes, which are the authoritative source. Entries are labelled where they are hand-curated sample data, pre-releases, or drawn from a secondary source such as a developer blog.

Reuse: the summaries, labels and curation here are © What's New. Quote freely with attribution and a link back; wholesale republication of the corpus is not permitted — terms: https://whatsnew.fyi/terms. The vendors' own release notes remain their publishers'.

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- **changed** — Improve observablearray proxy performance for es2023.array and es2022.array methods
- **fixed** — Action transparently forwards toString of underlying function

###### Minor Changes

-   [`ec5db592`](https://github.com/mobxjs/mobx/commit/ec5db592d7756826c31e710b1c759d7e9406b153) [#3792](https://github.com/mobxjs/mobx/pull/3792) Thanks [@tonyraoul](https://github.com/tonyraoul)! - Improve observablearray proxy pefromance for es2023.array and es2022.array methods

###### Patch Changes

-   [`86616c11`](https://github.com/mobxjs/mobx/commit/86616c11c108a511331eb05e55c08fc2c5a23f4d) [#3654](https://github.com/mobxjs/mobx/pull/3654) Thanks [@ahoisl](https://github.com/ahoisl)! - fix: action transparently forwards toString of underlying function