Question 1

How to integrate Fasterer with GitHub Actions?

Accepted Answer

Use the third-party action-fasterer integration via reviewdog, which posts comments in pull requests. Set it up in your workflow YAML file to run Fasterer automatically on code changes.

Question 2

Fasterer vs RuboCop for performance checks?

Accepted Answer

Fasterer is specialized for benchmark-backed micro-optimizations, while RuboCop is a general linter that may include performance rules but is broader in scope. Fasterer is better for focused speed improvements, but RuboCop offers more comprehensive code quality enforcement.

Question 3

Can Fasterer fix code automatically?

Accepted Answer

No, Fasterer is a static analysis tool that only suggests improvements; you must manually refactor the code based on its recommendations. There is no auto-fix feature included in the tool.

Question 4

What are the most common optimizations Fasterer suggests?

Accepted Answer

Common suggestions include using 'detect' instead of 'select.first', 'each_key' instead of 'keys.each', and 'tr' instead of 'gsub' for simple string replacements, as highlighted in the example output from the README.

Question 5

Is Fasterer suitable for Rails applications?

Accepted Answer

Yes, but with caution—the README notes that some optimizations, like while loops over each_with_index, may not be worthwhile in regular Rails projects where readability is key, but it can still help in performance-critical parts.

Question 6

How to disable specific rules in Fasterer?

Accepted Answer

Edit the .fasterer.yml configuration file and set the corresponding speedup rule to false, such as 'each_with_index_vs_while: false', to turn off that suggestion while keeping others enabled.

Fasterer

What is Fasterer?

Overview

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Pros & Cons

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Frequently Asked Questions