How do I identify which RSpec tests are running slowly?

You can use the built-in RSpec profiler by running 'rspec --profile' or configure the skill's custom timing hooks in your spec_helper.rb to log examples that exceed a specific duration.

What is the fastest way to create test data in RSpec?

Using 'build_stubbed' is generally fastest as it creates in-memory objects with fake IDs without hitting the database. For simple logic tests, 'build' is preferred over 'create'.

Can this skill help with parallelizing tests?

Yes, it provides configuration patterns for the 'parallel_tests' gem, including database.yml setup and strategies for avoiding race conditions between parallel processes.

When should I use let! instead of let?

Use 'let!' only when you need immediate side effects, such as triggering a database callback or establishing state that must exist before the 'it' block runs. Otherwise, use 'let' for lazy evaluation to save time.

RSpec Performance Optimizer

Name: RSpec Performance Optimizer
Author: bastos

bybastos

0•

Security & Testing

Optimizes RSpec test suites by providing expert techniques for profiling, database efficiency, and parallel execution.

The RSpec Performance skill provides domain-specific guidance for Ruby developers looking to accelerate their test suites and improve CI/CD efficiency. It offers actionable patterns for profiling slow examples, optimizing database interactions through FactoryBot's build and stub strategies, and correctly managing lazy vs. eager evaluation. Whether you are dealing with a bloated legacy suite or setting up parallel testing for a modern Rails application, this skill helps reduce feedback loops and increase developer productivity.

Key Features

01Mocking and stubbing patterns for external API and time-consuming methods

02Built-in RSpec profiling and custom timing instrumentation

03Parallel testing configuration for multi-core test execution

04Database optimization via build, build_stubbed, and batch inserts

05Optimization of let vs. let! patterns to reduce setup overhead

060 GitHub stars

Use Cases

01Reducing long-running CI pipeline execution times for Ruby on Rails projects

02Identifying and fixing performance bottlenecks in large RSpec test suites

03Transitioning from database-heavy tests to fast, in-memory unit tests

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add bastos/ruby-plugin-marketplace spec-performance

For use in Claude.ai and ChatGPT

Download Skill