Table of Contents

Don't Just Do Something, Stand There!
Measure before Optimizing
Nonlocality Considered Harmful
Throughput vs. Latency
Batching Operations
Overlapping Operations
Caching Operation Results

Premature optimization is the root of all evil.

-- C. A. R. Hoare

This is going to be a very short chapter, because the main thing Unix experience teaches us about optimizing for performance is how to know when not to do it. A secondary lesson is that the most effective optimization tactics are usually things we do for other reasons, such as cleanness of design.