The major theme is "reduce." After all, there is no code faster than no code!

• reducing allocation
• reducing copying
• reducing data movement
• reducing cache miss
• reducing synchronization
• reducing contention

Link

New Timer implementation

Reducing tail latencies with automatic cooperative task yielding

Async code should never spend a long time without reaching an .await.

A good rule of thumb is no more than 10 to 100 microseconds between each .await. That said, this depends on the kind of application you are writing.

Async: What is blocking?

Rust RFC 0230 - remove runtime, 2394 - async/await, 2592 - futures

• Concurrency (computer science)

• Concurrent computing

• Scheduling (computing)

• M:N (hybrid) threading model

• Thread pool

• Work stealing

• Fork–join model

• Blocking (computing)

• Asynchronous I/O

• Green thread

• Coroutine

• Async/await

• Futures and promises

• Finite-state machine

• Callback (computer programming)

• Lazy evaluation

• Continuation-passing style

• Cooperative multitasking

• Preemption (computing)

• Thrashing (computer science)

• Cache coherence protocol

• Resource contention

• Thundering herd problem

• Permutation test