I have heard that you can speed up your favorite compression algorithm by 1000x, if you are not so concerned about what happens when you try to decompress it.
I ran the test suite specifically for git's CLI as that was the target I wanted to build towards (Anthropic's C compiler failed to make an operating system since that was never in their original prompts/goals)
The way it gets organized is there are "scripts" which encompass different commands (status, diff, commit, etc) however each of these scripts themselves contain several hundred distinct assertions covering flags and arguments.
The test suite was my way of validating I not only had a feature implemented but also "valid" by git's standards