Performance Testing

It draws hundreds of live charts about a single computer with almost no setting up.

It opens a container image layer by layer and shows which files are wasting space.

It lists the known security holes in a project's parts and in packaged programs.

It generates traffic against a web service and reports what broke.

It loads one web page in a real browser, runs about a hundred checks, and prints a scored report.

Runs a command many times and reports how long it really takes.

A tool that rewrites SVG files to be much smaller without changing their appearance.

The reference type checker for Python, run from the command line.

Runs web requests written in a plain text file and checks the answers.

A test runner for JavaScript and TypeScript that reuses a project's existing Vite build settings.

A Python library that generates test inputs and reduces any failure to the smallest example that still fails.

A small JavaScript library that measures real page speed in real visitors' browsers.

It measures a site's speed with real browsers and keeps the history.

Runs Google's page-auditing tool across a whole site and collects the scores into one report.

A spell checker for source code that is fast enough to run on every save.

Tests get a real, empty PostgreSQL, started and destroyed automatically.

It reads slow queries and reports which PostgreSQL indexes to create.

It creates a pretend index in one second so PostgreSQL can say whether a real one would help.

Runs your tests and other jobs in fresh isolated environments, described in an ordinary Python file.

Checks a Python project's packages against the public advisory database and names the ones with known security holes.

It splits a huge PostgreSQL table into monthly pieces without stopping the database.

Deletes old build files from one project folder or a whole disk, by age, toolchain or size.

It runs a quality checklist against a font file and prints every fault it finds.

A command-line tool that runs a quality checklist over font files and reports the failures.