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

安全与测试

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

关于

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.

主要功能

Mocking and stubbing patterns for external API and time-consuming methods
Built-in RSpec profiling and custom timing instrumentation
Parallel testing configuration for multi-core test execution
Database optimization via build, build_stubbed, and batch inserts
Optimization of let vs. let! patterns to reduce setup overhead
0 GitHub stars

使用场景

Reducing long-running CI pipeline execution times for Ruby on Rails projects
Identifying and fixing performance bottlenecks in large RSpec test suites
Transitioning from database-heavy tests to fast, in-memory unit tests

关于

主要功能

Mocking and stubbing patterns for external API and time-consuming methods
Built-in RSpec profiling and custom timing instrumentation
Parallel testing configuration for multi-core test execution
Database optimization via build, build_stubbed, and batch inserts
Optimization of let vs. let! patterns to reduce setup overhead
0 GitHub stars

使用场景

Reducing long-running CI pipeline execution times for Ruby on Rails projects
Identifying and fixing performance bottlenecks in large RSpec test suites
Transitioning from database-heavy tests to fast, in-memory unit tests