--- a/contrib/perf.py Fri Jan 25 14:53:19 2019 -0500
+++ b/contrib/perf.py Mon Jan 28 04:47:40 2019 -0500
@@ -1017,6 +1017,14 @@
(b'', b'rev', b'', b'revision to be looked up (default tip)'),
] + formatteropts)
def perfindex(ui, repo, **opts):
+ """benchmark index creation time followed by a lookup
+
+ The default is to look `tip` up. Depending on the index implementation,
+ the revision looked up can matters. For example, an implementation
+ scanning the index will have a faster lookup time for `--rev tip` than for
+ `--rev 0`.
+
+ It is not currently possible to check for lookup of a missing node."""
import mercurial.revlog
opts = _byteskwargs(opts)
timer, fm = gettimer(ui, opts)