# arc shared resources

Published articles for arc shared resources.

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## Fearless Concurrency Ep.6: Understanding Rust ARC for Efficient Multithreading

DevFeed: [Fearless Concurrency Ep.6: Understanding Rust ARC for Efficient Multithreading](<https://devfeed.tech/articles/fearless-concurrency-ep-6-understanding-rust-arc-for-efficient-multithreading-22270.md>)

Original publisher: [Read original article](<https://www.ardanlabs.com/blog/2024/11/fearless-concurrency-ep6-understanding-rust-arc-for-efficient-multithreading.html>)

Published: 2024-11-21T00:00:00Z

Content type: article

Language: en

Sources: [William Kennedy](<https://devfeed.tech/sources/william-kennedy.md>)

Topics: [atomic reference counting](<https://devfeed.tech/topics/atomic-reference-counting.md>), [Concurrency](<https://devfeed.tech/topics/concurrency.md>), [Rust](<https://devfeed.tech/topics/rust.md>), [multithreading](<https://devfeed.tech/topics/multithreading.md>), [thread safe data sharing](<https://devfeed.tech/topics/thread-safe-data-sharing.md>), [Distributed Systems & Parallel Computing](<https://devfeed.tech/topics/distributed-systems-parallel-computing.md>)

Tags: [applications](<https://devfeed.tech/tags/applications.md>), [arc](<https://devfeed.tech/tags/arc.md>), [arc-best-practices](<https://devfeed.tech/tags/arc-best-practices.md>), [arc-for-performance](<https://devfeed.tech/tags/arc-for-performance.md>), [arc-in-rust](<https://devfeed.tech/tags/arc-in-rust.md>), [arc-memory-management](<https://devfeed.tech/tags/arc-memory-management.md>), [arc-ownership-model](<https://devfeed.tech/tags/arc-ownership-model.md>), [arc-shared-resources](<https://devfeed.tech/tags/arc-shared-resources.md>), [arc-vs-garbage-collection](<https://devfeed.tech/tags/arc-vs-garbage-collection.md>), [arc-with-mutex](<https://devfeed.tech/tags/arc-with-mutex.md>), [arc-with-rwlock](<https://devfeed.tech/tags/arc-with-rwlock.md>), [atomic](<https://devfeed.tech/tags/atomic.md>), [atomic-reference-counting](<https://devfeed.tech/tags/atomic-reference-counting.md>), [best-practices](<https://devfeed.tech/tags/best-practices.md>), [concurrency](<https://devfeed.tech/tags/concurrency.md>), [concurrency-in-rust](<https://devfeed.tech/tags/concurrency-in-rust.md>), [configuration](<https://devfeed.tech/tags/configuration.md>), [connection-pool](<https://devfeed.tech/tags/connection-pool.md>), [database](<https://devfeed.tech/tags/database.md>), [efficient-multithreading-rust](<https://devfeed.tech/tags/efficient-multithreading-rust.md>), [garbage-collection](<https://devfeed.tech/tags/garbage-collection.md>), [global](<https://devfeed.tech/tags/global.md>), [heap](<https://devfeed.tech/tags/heap.md>), [implementation](<https://devfeed.tech/tags/implementation.md>), [interior-mutability-arc](<https://devfeed.tech/tags/interior-mutability-arc.md>), [large](<https://devfeed.tech/tags/large.md>), [lightweight](<https://devfeed.tech/tags/lightweight.md>), [lightweight-memory-management](<https://devfeed.tech/tags/lightweight-memory-management.md>), [memory](<https://devfeed.tech/tags/memory.md>), [multithreading](<https://devfeed.tech/tags/multithreading.md>), [multithreading-with-arc](<https://devfeed.tech/tags/multithreading-with-arc.md>), [ownership](<https://devfeed.tech/tags/ownership.md>), [rust](<https://devfeed.tech/tags/rust.md>), [rust-arc-tutorial](<https://devfeed.tech/tags/rust-arc-tutorial.md>), [rust-arc-use-cases](<https://devfeed.tech/tags/rust-arc-use-cases.md>), [rust-concurrency-tools](<https://devfeed.tech/tags/rust-concurrency-tools.md>), [rust-shared-ownership](<https://devfeed.tech/tags/rust-shared-ownership.md>), [rust-thread-safe-programming](<https://devfeed.tech/tags/rust-thread-safe-programming.md>), [thread-safe-data-sharing](<https://devfeed.tech/tags/thread-safe-data-sharing.md>)

### AI overview

Rust ARC shares a heap-allocated value across threads by cloning a pointer and incrementing its reference count; dropping each pointer decrements the count, and the value is destroyed when the count reaches zero. This avoids copying the underlying data and can suit high fan-out sharing, such as sharing configuration or a database connection pool. The excerpt also mentions combining ARC with interior mutability for thread-safe updates and flags circular references as a pitfall. It presents ARC as shared ownership without a traditional garbage collector; the excerpt does not identify the interior-mutability types or give their usage details.

### Source excerpt

Introduction: Welcome to Episode 6 of the Fearless Concurrency in Rust series! In this episode, we explore the powerful concept of ARC (Atomic Reference Counting) and its critical role in managing shared resources in multithreaded Rust programs. By leveraging ARC, developers can safely share ownership of data across threads without relying on a traditional garbage collector, enabling efficient, flexible, and scalable concurrency. What is ARC?: Understanding Atomic Reference Counting as a lightweight, manual garbage collection system.