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Periphery, a famous and efficient tool to check dead code, moves from open source model to commercial model 😭

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[-] Kissaki@programming.dev 17 points 2 weeks ago* (last edited 2 weeks ago)

Periphery finds unused code in Swift projects

Small indie and hobby projects will be able to use Periphery for free, so too will open-source projects of any size. Larger projects developed by companies with the resources to purchase a license will benefit from a more capable tool. The first phase in this transition is an open beta. Everyone can obtain a free beta license with no restrictions on project size. The open beta doesn’t have an end date yet, but ample notice will be given when that date is determined.

[-] Carighan@piefed.world 17 points 2 weeks ago

Yeah from the explanation I kinda feel for the dev, they gotta be inundated in PRs.

I suspect someone will continue working from the current codebase?

[-] eleijeep@piefed.social 3 points 2 weeks ago

Was it really useful? Code coverage tools have existed for forever. Does Swift not have any FLOSS coverage tools like gcov?

[-] urushitan@kakera.kintsugi.moe 3 points 2 weeks ago

Code coverage tools are generally specifically about test coverage, not which code actually gets executed or is unreachable. It makes sense in swift because code with tests would still report as being covered even if the actual UI that would ever run that code was removed. That’s what this tool looks for. Dead code, not untested code

[-] eleijeep@piefed.social 0 points 2 weeks ago

I know what the tool does, I read the webpage.

Code coverage tools are generally specifically about test coverage, not which code actually gets executed or is unreachable.

Code coverage tools are for whatever you want to use them for. Lots of people use them to measure test coverage, but you can also use them to measure code usage in production. There are a variety of different ways to instrument code of various different levels of invasiveness and performance impact. Even the Linux kernel has built in instrumentation for measuring code coverage (kcov).

this post was submitted on 12 Aug 2026
80 points (98.8% liked)

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