midConcurrency
Explain Future and Promise patterns.
Updated Apr 28, 2026
Short answer
Objects that act as proxies for a result that is initially unknown, usually because the computation of its value is yet incomplete.
Deep explanation
Mid-level concurrency focuses on coordination patterns. The goal is to move beyond simple 'locks' and use high-level abstractions provided by the language or framework (like Thread Pools) to ensure scalability.
Real-world example
A database connection pool limiting the number of simultaneous connections to 20.
Common mistakes
- Using a heavy Mutex for a scenario where 99% of operations are Reads.
Follow-up questions
- What is the 'Condition' variable in a lock?