0 Allocations: The Future of C++ Execution | Ep. 21 |
C++11 concurrency was a "dead end" for high-performance systems. Between the eager execution of std::async and the massive trail of heap allocations required by shared states, the old model fundamentally violated the principles of zero-overhead engineering.
In this video, we dissect the architectural shift coming in C++26 with P2300: The Standard Execution Library. We explore how Senders, Receivers, and Schedulers move us from a reactive "pager" model to a structured "conveyor belt" approach, allowing the compiler to see—and optimize—your entire execution graph before a single instruction runs.
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00:00 The C++11 "Dead End"
00:25 The Failed Attempt to Salvage Futures (P1059)
01:08 Introducing C++26 Structured Concurrency (P2300)
01:18 The Restaurant vs. The Factory Analogy
01:59 Mechanics: Senders, Receivers, and Schedulers
02:22 How Lazy Execution Enables Zero-Cost Optimization
03:01 Eliminating the Overhead