Understanding CPU Branch Prediction and Branchless Programming in C++
By
Sagar
Summary
This article explains CPU branch prediction in the context of C++ performance optimization. It covers how modern CPUs use pipelining to execute instructions, how branch mispredictions cause pipeline stalls, and introduces branchless programming techniques to avoid conditional branches. The piece includes benchmarking approaches to measure branch overhead and practical patterns for writing low-latency, high-performance C++ code.
Source
Twitter / XUnderstanding CPU Branch Prediction and Branchless Programming in C++towardsdev.comKey quotes
· 3 pulledModern CPUs don't execute one instruction, wait, then execute the next. They work like an assembly line.
This is called pipelining, and it's why your CPU can do billions of operations per second.
Stop letting CPU mispredictions slow down your code.
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