grosser/parallel_tests

Health v2 · maintenance only

Flags: no_releases

Adoption not part of the score

3517 stars · 510 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded

A Ruby gem that speeds up test suites by splitting Minitest, RSpec, Cucumber, Spinach, and Turnip tests into balanced groups and running them in parallel across CPU cores, with one database per process. It integrates with Rails via rake tasks for creating, migrating, and preparing parallel test databases.

Use cases

• speed up slow rspec test suite
• run cucumber features in parallel
• parallelize tests in CI to reduce build time
• run tests with a separate database per process
• split tests into balanced groups by runtime
• run arbitrary rake tasks in parallel

When to choose

• you have a large Ruby/Rails test suite that takes too long to run
• you use RSpec, Minitest, or Cucumber and have multiple CPU cores
• you want per-process test databases with automatic setup rake tasks

When to avoid

• your test suite is already fast or too small to benefit from parallelization
• your tests cannot run in isolation or share mutable global state
• you are not working in Ruby

Facets

library · maturity active

testing e2e-testing concurrency cli testing developer-tools web-development ruby cli cross-platform rspec cucumber minitest test-parallelization rails spinach turnip

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markdown · JSON · MCP: product_card(name="grosser/parallel_tests")