On Jul 24, 2012 9:32 PM, "C. Michael Pilato" <cmpil...@collab.net> wrote: >... > For ra_serf: I was right again. It's just a string operation when the > repos root URL is known. But I overestimated how common it was for this > value to be known. All HTTPv2 servers transmit the repos root URL when the > session is initialized via the OPTIONS command. For older servers, the > repos root URL is calculated and cached opportunistically as part of other > operations, but isn't strictly guaranteed to have been determined before any > particular reparent operation occurs. And when discovered in this fashion, > it's done using the very sort of PROPFIND dance that HTTPv2 was introduced > to eliminate. So yeah, potentially pretty costly.
But that dance *must* occur at least once for old servers. Whether it happens at reparent, or some other operation... as long as the result is saved, then there is zero *additional* cost to a reparent in ra_serf. Cheers, -g
