Ex-Googler here. I found working at Google to be slower pace than the previous startups I worked at due to the code review process (reviewers sometimes being in different time zones or just being slow for whatever reason) and the time to takes for tests to run. (Global presubmits often had to run overnight for example.)
You can get around it by having multiple changes going in parallel, but it's still a lot of overhead. I don't think it was just me either. This seemed to be a common complaint. Maybe it's fixed by now?
This is going to vary a lot depending on the team and where you are working in the stack. Lumping Google and Facebook together and saying "there is absolutely nothing slow about it" seems too strong, though.
You can get around it by having multiple changes going in parallel, but it's still a lot of overhead. I don't think it was just me either. This seemed to be a common complaint. Maybe it's fixed by now?
This is going to vary a lot depending on the team and where you are working in the stack. Lumping Google and Facebook together and saying "there is absolutely nothing slow about it" seems too strong, though.