Measure before you optimize
On This Lesson 4 topics
This lesson is planned. The outline below lists the topics it will cover. The full lesson has not been published yet.
In this lesson
apply a repeatable performance loop.
Planned topics
- Loop: measure, hypothesize, change one thing, re-measure.
- Intuition about hot spots is often wrong; the profile decides.
- Define the goal first (p95 latency, throughput) and measure under realistic load.
- Profile in production-like mode, not debug mode; run long enough to pass warm-up and repeat runs for variance.
- Keep an investigation log: what was measured, what changed, the result.
Draft outline details
Demonstration
a log template: symptom, evidence, hypothesis, change, before/after numbers.
Check your understanding
Why change only one thing per iteration?
Show answer
So you know which change caused the effect.
Practice
Apply this lesson with the module's lab, exercises and quiz.
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