# Native Concurrency and Parallelism Optimization in JavaScript: "Parallel Primitives"

**URL:** <https://es.discourse.group/t/native-concurrency-and-parallelism-optimization-in-javascript-parallel-primitives/2391>\
**Category:** 💡 Ideas\
**Tags:** proposal\
**Created:** [June 20, 2025, 2:37am UTC](https://es.discourse.group/t/native-concurrency-and-parallelism-optimization-in-javascript-parallel-primitives/2391 "2025-06-20T02:37:28Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![edison-manrique](https://yyz2.discourse-cdn.com/free1/user_avatar/es.discourse.group/edison-manrique/32/2487_2.png) [@edison-manrique](https://es.discourse.group/u/edison-manrique)\
**Post date:** [June 20, 2025, 2:37am UTC](https://es.discourse.group/t/native-concurrency-and-parallelism-optimization-in-javascript-parallel-primitives/2391/1 "2025-06-20T02:37:28Z")

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This proposal aims to introduce a set of "parallel primitives" directly into the JavaScript language, enabling developers to leverage the multi-core and multi-threaded capabilities of modern CPUs in a more efficient and transparent manner, without the overhead of Workers, message serialization/deserialization, or the need to load external code. The idea is to offer a more "lightweight" and integrated form of parallelism within the language.

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**Author:** ![aclaymore](https://yyz2.discourse-cdn.com/free1/user_avatar/es.discourse.group/aclaymore/32/501_2.png) [@aclaymore](https://es.discourse.group/u/aclaymore)\
**Post date:** [June 20, 2025, 5:54am UTC](https://es.discourse.group/t/native-concurrency-and-parallelism-optimization-in-javascript-parallel-primitives/2391/2 "2025-06-20T05:54:36Z")

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This post both appears to be generated by an LLM and also lacks any concrete questions or proposal idea.

Each JavaScript agent executes the language in a single threaded fashion. Without example code it is difficult to guess what primitives could be added that would add parallelisation in a way that is meaningfully different from workers.

IMO [GitHub - tc39/proposal-structs: JavaScript Structs: Fixed Layout Objects](https://github.com/tc39/proposal-structs) is one of the most interesting 262 proposals in this space.

Also note that the proposal to add SIMD to 262 was withdrawn in favour of adding SIMD to wasm. [GitHub - tc39/ecmascript\_simd: SIMD numeric type for EcmaScript](https://github.com/tc39/ecmascript_simd)