sidedata: use only changegroup3 if sidedata is in use This is necessary to exchange the flags over the wire (and within bundles). Differential Revision: https://phab.mercurial-scm.org/D6940

sidedata: apply basic but tight security around exchange We don't currently have code to deal with exchange between repository using sidedata and repository not using sidedata. Until we implement such code (eg: dropping side data when pushing to a non-sidedata repo) we prevent the two kind of repo to speak to each other. This is somewhere similar to what 'treemanifest' does. Note that sidedata exchange is broken unless one use changegroup v3 anyway. See next changeset for details. Differential Revision: https://phab.mercurial-scm.org/D6939

perf: use `setup` function in `perfdirstatewrite` The command seems to pre-date the introduction of the `setup` support in timer. We move the line that is obviously about benchmark setup in such `setup` function.

perf: document `perfdirstatewrite`

perf: use `setup` function in `perfdirfoldmap` The command seems to pre-date the introduction of the `setup` support in timer. We move the line that is obviously about benchmark setup in such `setup` function.

perf: document `perfdirfoldmap`

perf: use `setup` function in `perfdirstatefoldmap` The command seems to pre-date the introduction of the `setup` support in timer. We move the line that is obviously about benchmark setup in such `setup` function.