There's no reason you can't incrementally develop your change over time and then send it when it looks right. You don't need review for every edit. At Google

There's no reason you can't incrementally develop your change over time and then send it when it looks right. You don't need review for every edit. At Google you only need review to commit your change to the mainline repository. For long-running projects it's also permitted at that company to check in whatever you'd like into //experimental/users/<your_username>/...