A few days ago, I wrote about an issue I encountered where the code coverage for one of my projects failed on CI but worked fine locally. I also discussed a solution. It turns out there's an even better alternative: switch code coverage tools entirely and use llvm-cov instead of tarpaulin.
The main reasons I switched to llvm-cov are that it feels more modern, and more importantly, the time required to run code coverage improved dramatically—from 4 minutes down to just 1 minute and 30 seconds. One contributing factor was an OpenSSL build dependency in my Cargo configuration, introduced by tarpaulin, which took a long time to compile. (To be fair, I probably could have installed OpenSSL as a binary, but I didn't want to introduce another program just for a coverage tool.) Switching to llvm-cov allowed me to remove this redundant dependency, which my project didn't really need in the first place.
That's it—just a short update I thought was worth sharing.
Thank you for reading,
Hans