Target OS means the OS you run test on, while host OS is the place you run this script. They are same most of time, while Android is the only known exception now.
| Name | Description |
| Chromium |
Sync to any revision, including a single roll Build with different options Backup Download any revision from Google |
| Mesa |
Build any revision Build a range of revisions |
bisect mesa, webmark, angle, aosp, chromeos, dawn, skia, v8 how to port performance test, how to port webgl-cts