Performance: do's and don'ts

Overview

Questions

• Can you give me some guiding principles on how to keep Julia code performant?

Objectives

• Identify potential problems with given code.

Type Stability

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Callout

A good summary on type stability can be found in the following blog post: - Writing type-stable Julia code

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Key Points

• Don’t use mutable global variables.
• Write your code inside functions.
• Specify element types for containers and structs.
• Specialize functions instead of doing manual dispatch.
• Write functions that always return the same type (type stability).
• Don’t change the type of variables.