Comment 1 for bug 1619072

This sounds reasonable, although only for ec2 metadata (I don't think occ collects the native nova metadata does it, because that's not immutable, the key/value pairs can defintely be updated)

Considering the variety of performance challenges we face, this seems like a fairly easy incremental gain, so +1 - I'll target it at rc1 and we can see if a fix can be landed by newton, thanks!