Building GrapheneOS and Vanadium on both a Ryzen 9 5950X and i7-6950X at the same time is a nice improvement.
Clean builds on Ryzen 9 5950X are a bit over 2x faster. It's not quite that much faster for most incremental builds, but it's still substantial, even for small changes.
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A clean build of the entire OS for the Pixel 5 takes about 40 minutes on the Ryzen 9 5950X. The vast majority of development builds are incremental builds taking a couple minutes.
Signing a production release also adds a bit more time but doesn't depend on the build directory.
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so when u make a minor change to the os and you want to test it, you do an incremental build which takes a few minutes and then it's up and running on your test-device?
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Yes, although a lot can also be tested with the emulator rather than needing to flash or sync to a device. Tend to test on a real device most of the time though. It's also a lot faster to do testing with an unlocked device + development builds. Avoid needing to sign + sideload.
