wireprotov2: advertise recommended batch size for requests...
wireprotov2: advertise recommended batch size for requests
Currently, exchangev2 hardcodes the batch size for how many revisions
to fetch per command request. A single value is not appropriate
for every repository because some repositories may have a drastically
different "shape" from other repositories. e.g. a repo with lots of
small files may benefit from larger batch sizes than a repo with lots
of large files. And depending on caching used by the server, the server
may wish to control the number of commands (to e.g. mitigate overhead
of following content redirects).
This commit teaches wireprotov2 commands to declare extra metadata
which is advertised as part of the command descriptor. The manifestdata
command has been taught to advertise a recommended batch size for
requests.
Differential Revision:
https://phab.mercurial-scm.org/D4975
