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Multithreaded communication primitives are safe but inefficient

6/10 Medium

Sync/Send semantics, Mutex, and Arc provide memory safety for concurrent code but have poor CPU cache behavior and performance characteristics, undermining Rust's performance-first positioning for intensive multithreaded applications.

Rust
Category
performance
Workaround
partial
Freshness
persistent
Scope
language
Upstream
open
Recurring
Yes
Buyer Type
team
Maintainer
active

Sources

Collection History

Query: “What are the most common pain points with Rust for developers in 2025?”3/30/2026

Sync/Send, Mutex and reference counting (Arc)? Unfortunately, those lock or simply mess with CPU caches badly, so they are inefficient for multithreaded communication... They are safe, but inefficient.

Created: 3/30/2026Updated: 3/30/2026