Leif Åstrand
39c7d9f68a
Omit empty hierarchy data from the response (#18510)
Reduces the payload size for the "Update all labels" action with 40
layouts in BasicPerformanceTest by 16% (from 11087 to 9270 bytes). The
reduction is improved to 22% (1855 to 1455) if the response is gzipped
since the omited data doesn't compress very well.
Change-Id: I1d2837c93222fffa59b14836f162e3e87349e086