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Technical notes

Software performance,
in practice.

Practical thinking about software performance, from the shape of a latency distribution to the limits of adding more infrastructure.

LATENCY / 5 MIN READ

Your average latency looks fine. Why are users still waiting?

Understand the tail, choose useful measurements, and investigate the requests an average can hide.

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SCALABILITY / 5 MIN READ

Before adding servers: finding the bottleneck that limits growth.

A practical sequence for finding your system’s limiting resource before buying more capacity.

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