perf: document `perfstatus`

contrib/perf.py

@@ -764,6 +764,13 b' def perfannotate(ui, repo, f, **opts):'
     + formatteropts,
 )
 def perfstatus(ui, repo, **opts):
+    """benchmark the performance of a single status call
+
+    The repository data are preserved between each call.
+
+    By default, only the status of the tracked file are requested. If
+    `--unknown` is passed, the "unknown" files are also tracked.
+    """
     opts = _byteskwargs(opts)
     # m = match.always(repo.root, repo.getcwd())
     # timer(lambda: sum(map(len, repo.dirstate.status(m, [], False, False,

tests/test-contrib-perf.t

@@ -172,7 +172,7 b' perfstatus'
    perfrevrange  (no help text available)
    perfrevset    benchmark the execution time of a revset
    perfstartup   (no help text available)
-   perfstatus    (no help text available)
+   perfstatus    benchmark the performance of a single status call
    perftags      (no help text available)
    perftemplating
                  test the rendering time of a given template