--- a/contrib/perf.py	Tue Jan 19 12:22:05 2021 -0500
+++ b/contrib/perf.py	Fri Dec 04 10:11:01 2020 +0100
@@ -744,7 +744,7 @@
 # perf commands
 
 
-@command(b'perfwalk', formatteropts)
+@command(b'perf--walk', formatteropts)
 def perfwalk(ui, repo, *pats, **opts):
     opts = _byteskwargs(opts)
     timer, fm = gettimer(ui, opts)
@@ -759,7 +759,7 @@
     fm.end()
 
 
-@command(b'perfannotate', formatteropts)
+@command(b'perf--annotate', formatteropts)
 def perfannotate(ui, repo, f, **opts):
     opts = _byteskwargs(opts)
     timer, fm = gettimer(ui, opts)
@@ -769,7 +769,7 @@
 
 
 @command(
-    b'perfstatus',
+    b'perf--status',
     [
         (b'u', b'unknown', False, b'ask status to look for unknown files'),
         (b'', b'dirstate', False, b'benchmark the internal dirstate call'),
@@ -806,7 +806,7 @@
     fm.end()
 
 
-@command(b'perfaddremove', formatteropts)
+@command(b'perf--addremove', formatteropts)
 def perfaddremove(ui, repo, **opts):
     opts = _byteskwargs(opts)
     timer, fm = gettimer(ui, opts)
@@ -837,7 +837,7 @@
         cl._nodepos = None
 
 
-@command(b'perfheads', formatteropts)
+@command(b'perf--heads', formatteropts)
 def perfheads(ui, repo, **opts):
     """benchmark the computation of a changelog heads"""
     opts = _byteskwargs(opts)
@@ -855,7 +855,7 @@
 
 
 @command(
-    b'perftags',
+    b'perf--tags',
     formatteropts
     + [
         (b'', b'clear-revlogs', False, b'refresh changelog and manifest'),
@@ -880,7 +880,7 @@
     fm.end()
 
 
-@command(b'perfancestors', formatteropts)
+@command(b'perf--ancestors', formatteropts)
 def perfancestors(ui, repo, **opts):
     opts = _byteskwargs(opts)
     timer, fm = gettimer(ui, opts)
@@ -894,7 +894,7 @@
     fm.end()
 
 
-@command(b'perfancestorset', formatteropts)
+@command(b'perf--ancestorset', formatteropts)
 def perfancestorset(ui, repo, revset, **opts):
     opts = _byteskwargs(opts)
     timer, fm = gettimer(ui, opts)
@@ -910,7 +910,7 @@
     fm.end()
 
 
-@command(b'perfdiscovery', formatteropts, b'PATH')
+@command(b'perf--discovery', formatteropts, b'PATH')
 def perfdiscovery(ui, repo, path, **opts):
     """benchmark discovery between local repo and the peer at given path"""
     repos = [repo, None]
@@ -928,7 +928,7 @@
 
 
 @command(
-    b'perfbookmarks',
+    b'perf--bookmarks',
     formatteropts
     + [
         (b'', b'clear-revlogs', False, b'refresh changelog and manifest'),
@@ -953,7 +953,7 @@
     fm.end()
 
 
-@command(b'perfbundleread', formatteropts, b'BUNDLE')
+@command(b'perf--bundleread', formatteropts, b'BUNDLE')
 def perfbundleread(ui, repo, bundlepath, **opts):
     """Benchmark reading of bundle files.
 
@@ -1080,7 +1080,7 @@
 
 
 @command(
-    b'perfchangegroupchangelog',
+    b'perf--changegroupchangelog',
     formatteropts
     + [
         (b'', b'cgversion', b'02', b'changegroup version'),
@@ -1116,7 +1116,7 @@
     fm.end()
 
 
-@command(b'perfdirs', formatteropts)
+@command(b'perf--dirs', formatteropts)
 def perfdirs(ui, repo, **opts):
     opts = _byteskwargs(opts)
     timer, fm = gettimer(ui, opts)
@@ -1132,7 +1132,7 @@
 
 
 @command(
-    b'perfdirstate',
+    b'perf--dirstate',
     [
         (
             b'',
@@ -1195,7 +1195,7 @@
     fm.end()
 
 
-@command(b'perfdirstatedirs', formatteropts)
+@command(b'perf--dirstatedirs', formatteropts)
 def perfdirstatedirs(ui, repo, **opts):
     """benchmap a 'dirstate.hasdir' call from an empty `dirs` cache"""
     opts = _byteskwargs(opts)
@@ -1212,7 +1212,7 @@
     fm.end()
 
 
-@command(b'perfdirstatefoldmap', formatteropts)
+@command(b'perf--dirstatefoldmap', formatteropts)
 def perfdirstatefoldmap(ui, repo, **opts):
     """benchmap a `dirstate._map.filefoldmap.get()` request
 
@@ -1233,7 +1233,7 @@
     fm.end()
 
 
-@command(b'perfdirfoldmap', formatteropts)
+@command(b'perf--dirfoldmap', formatteropts)
 def perfdirfoldmap(ui, repo, **opts):
     """benchmap a `dirstate._map.dirfoldmap.get()` request
 
@@ -1255,7 +1255,7 @@
     fm.end()
 
 
-@command(b'perfdirstatewrite', formatteropts)
+@command(b'perf--dirstatewrite', formatteropts)
 def perfdirstatewrite(ui, repo, **opts):
     """benchmap the time it take to write a dirstate on disk"""
     opts = _byteskwargs(opts)
@@ -1297,7 +1297,7 @@
 
 
 @command(
-    b'perfmergecalculate',
+    b'perf--mergecalculate',
     [
         (b'r', b'rev', b'.', b'rev to merge against'),
         (b'', b'from', b'', b'rev to merge from'),
@@ -1330,7 +1330,7 @@
 
 
 @command(
-    b'perfmergecopies',
+    b'perf--mergecopies',
     [
         (b'r', b'rev', b'.', b'rev to merge against'),
         (b'', b'from', b'', b'rev to merge from'),
@@ -1353,7 +1353,7 @@
     fm.end()
 
 
-@command(b'perfpathcopies', [], b"REV REV")
+@command(b'perf--pathcopies', [], b"REV REV")
 def perfpathcopies(ui, repo, rev1, rev2, **opts):
     """benchmark the copy tracing logic"""
     opts = _byteskwargs(opts)
@@ -1369,7 +1369,7 @@
 
 
 @command(
-    b'perfphases',
+    b'perf--phases',
     [
         (b'', b'full', False, b'include file reading time too'),
     ],
@@ -1394,7 +1394,7 @@
     fm.end()
 
 
-@command(b'perfphasesremote', [], b"[DEST]")
+@command(b'perf--phasesremote', [], b"[DEST]")
 def perfphasesremote(ui, repo, dest=None, **opts):
     """benchmark time needed to analyse phases of the remote server"""
     from mercurial.node import bin
@@ -1455,7 +1455,7 @@
 
 
 @command(
-    b'perfmanifest',
+    b'perf--manifest',
     [
         (b'm', b'manifest-rev', False, b'Look up a manifest node revision'),
         (b'', b'clear-disk', False, b'clear on-disk caches too'),
@@ -1499,7 +1499,7 @@
     fm.end()
 
 
-@command(b'perfchangeset', formatteropts)
+@command(b'perf--changeset', formatteropts)
 def perfchangeset(ui, repo, rev, **opts):
     opts = _byteskwargs(opts)
     timer, fm = gettimer(ui, opts)
@@ -1513,7 +1513,7 @@
     fm.end()
 
 
-@command(b'perfignore', formatteropts)
+@command(b'perf--ignore', formatteropts)
 def perfignore(ui, repo, **opts):
     """benchmark operation related to computing ignore"""
     opts = _byteskwargs(opts)
@@ -1532,7 +1532,7 @@
 
 
 @command(
-    b'perfindex',
+    b'perf--index',
     [
         (b'', b'rev', [], b'revision to be looked up (default tip)'),
         (b'', b'no-lookup', None, b'do not revision lookup post creation'),
@@ -1596,7 +1596,7 @@
 
 
 @command(
-    b'perfnodemap',
+    b'perf--nodemap',
     [
         (b'', b'rev', [], b'revision to be looked up (default tip)'),
         (b'', b'clear-caches', True, b'clear revlog cache between calls'),
@@ -1667,7 +1667,7 @@
     fm.end()
 
 
-@command(b'perfstartup', formatteropts)
+@command(b'perf--startup', formatteropts)
 def perfstartup(ui, repo, **opts):
     opts = _byteskwargs(opts)
     timer, fm = gettimer(ui, opts)
@@ -1685,7 +1685,7 @@
     fm.end()
 
 
-@command(b'perfparents', formatteropts)
+@command(b'perf--parents', formatteropts)
 def perfparents(ui, repo, **opts):
     """benchmark the time necessary to fetch one changeset's parents.
 
@@ -1712,7 +1712,7 @@
     fm.end()
 
 
-@command(b'perfctxfiles', formatteropts)
+@command(b'perf--ctxfiles', formatteropts)
 def perfctxfiles(ui, repo, x, **opts):
     opts = _byteskwargs(opts)
     x = int(x)
@@ -1725,7 +1725,7 @@
     fm.end()
 
 
-@command(b'perfrawfiles', formatteropts)
+@command(b'perf--rawfiles', formatteropts)
 def perfrawfiles(ui, repo, x, **opts):
     opts = _byteskwargs(opts)
     x = int(x)
@@ -1739,7 +1739,7 @@
     fm.end()
 
 
-@command(b'perflookup', formatteropts)
+@command(b'perf--lookup', formatteropts)
 def perflookup(ui, repo, rev, **opts):
     opts = _byteskwargs(opts)
     timer, fm = gettimer(ui, opts)
@@ -1748,7 +1748,7 @@
 
 
 @command(
-    b'perflinelogedits',
+    b'perf--linelogedits',
     [
         (b'n', b'edits', 10000, b'number of edits'),
         (b'', b'max-hunk-lines', 10, b'max lines in a hunk'),
@@ -1786,7 +1786,7 @@
     fm.end()
 
 
-@command(b'perfrevrange', formatteropts)
+@command(b'perf--revrange', formatteropts)
 def perfrevrange(ui, repo, *specs, **opts):
     opts = _byteskwargs(opts)
     timer, fm = gettimer(ui, opts)
@@ -1795,7 +1795,7 @@
     fm.end()
 
 
-@command(b'perfnodelookup', formatteropts)
+@command(b'perf--nodelookup', formatteropts)
 def perfnodelookup(ui, repo, rev, **opts):
     opts = _byteskwargs(opts)
     timer, fm = gettimer(ui, opts)
@@ -1814,7 +1814,7 @@
 
 
 @command(
-    b'perflog',
+    b'perf--log',
     [(b'', b'rename', False, b'ask log to follow renames')] + formatteropts,
 )
 def perflog(ui, repo, rev=None, **opts):
@@ -1832,7 +1832,7 @@
     fm.end()
 
 
-@command(b'perfmoonwalk', formatteropts)
+@command(b'perf--moonwalk', formatteropts)
 def perfmoonwalk(ui, repo, **opts):
     """benchmark walking the changelog backwards
 
@@ -1851,7 +1851,7 @@
 
 
 @command(
-    b'perftemplating',
+    b'perf--templating',
     [
         (b'r', b'rev', [], b'revisions to run the template on'),
     ]
@@ -1941,7 +1941,7 @@
 
 
 @command(
-    b'perfhelper-mergecopies',
+    b'perf--helper-mergecopies',
     formatteropts
     + [
         (b'r', b'revs', [], b'restrict search to these revisions'),
@@ -2124,7 +2124,7 @@
 
 
 @command(
-    b'perfhelper-pathcopies',
+    b'perf--helper-pathcopies',
     formatteropts
     + [
         (b'r', b'revs', [], b'restrict search to these revisions'),
@@ -2263,7 +2263,7 @@
         _displaystats(ui, opts, entries, alldata)
 
 
-@command(b'perfcca', formatteropts)
+@command(b'perf--cca', formatteropts)
 def perfcca(ui, repo, **opts):
     opts = _byteskwargs(opts)
     timer, fm = gettimer(ui, opts)
@@ -2271,7 +2271,7 @@
     fm.end()
 
 
-@command(b'perffncacheload', formatteropts)
+@command(b'perf--fncacheload', formatteropts)
 def perffncacheload(ui, repo, **opts):
     opts = _byteskwargs(opts)
     timer, fm = gettimer(ui, opts)
@@ -2284,7 +2284,7 @@
     fm.end()
 
 
-@command(b'perffncachewrite', formatteropts)
+@command(b'perf--fncachewrite', formatteropts)
 def perffncachewrite(ui, repo, **opts):
     opts = _byteskwargs(opts)
     timer, fm = gettimer(ui, opts)
@@ -2304,7 +2304,7 @@
     fm.end()
 
 
-@command(b'perffncacheencode', formatteropts)
+@command(b'perf--fncacheencode', formatteropts)
 def perffncacheencode(ui, repo, **opts):
     opts = _byteskwargs(opts)
     timer, fm = gettimer(ui, opts)
@@ -2348,7 +2348,7 @@
 
 
 @command(
-    b'perfbdiff',
+    b'perf--bdiff',
     revlogopts
     + formatteropts
     + [
@@ -2464,7 +2464,7 @@
 
 
 @command(
-    b'perfunidiff',
+    b'perf--unidiff',
     revlogopts
     + formatteropts
     + [
@@ -2543,7 +2543,7 @@
     fm.end()
 
 
-@command(b'perfdiffwd', formatteropts)
+@command(b'perf--diffwd', formatteropts)
 def perfdiffwd(ui, repo, **opts):
     """Profile diff of working directory changes"""
     opts = _byteskwargs(opts)
@@ -2568,7 +2568,7 @@
     fm.end()
 
 
-@command(b'perfrevlogindex', revlogopts + formatteropts, b'-c|-m|FILE')
+@command(b'perf--revlogindex', revlogopts + formatteropts, b'-c|-m|FILE')
 def perfrevlogindex(ui, repo, file_=None, **opts):
     """Benchmark operations against a revlog index.
 
@@ -2704,7 +2704,7 @@
 
 
 @command(
-    b'perfrevlogrevisions',
+    b'perf--revlogrevisions',
     revlogopts
     + formatteropts
     + [
@@ -2754,7 +2754,7 @@
 
 
 @command(
-    b'perfrevlogwrite',
+    b'perf--revlogwrite',
     revlogopts
     + formatteropts
     + [
@@ -3047,7 +3047,7 @@
 
 
 @command(
-    b'perfrevlogchunks',
+    b'perf--revlogchunks',
     revlogopts
     + formatteropts
     + [
@@ -3176,7 +3176,7 @@
 
 
 @command(
-    b'perfrevlogrevision',
+    b'perf--revlogrevision',
     revlogopts
     + formatteropts
     + [(b'', b'cache', False, b'use caches instead of clearing')],
@@ -3319,7 +3319,7 @@
 
 
 @command(
-    b'perfrevset',
+    b'perf--revset',
     [
         (b'C', b'clear', False, b'clear volatile cache between each call.'),
         (b'', b'contexts', False, b'obtain changectx for each revision'),
@@ -3352,7 +3352,7 @@
 
 
 @command(
-    b'perfvolatilesets',
+    b'perf--volatilesets',
     [
         (b'', b'clear-obsstore', False, b'drop obsstore between each call.'),
     ]
@@ -3401,7 +3401,7 @@
 
 
 @command(
-    b'perfbranchmap',
+    b'perf--branchmap',
     [
         (b'f', b'full', False, b'Includes build time of subset'),
         (
@@ -3492,7 +3492,7 @@
 
 
 @command(
-    b'perfbranchmapupdate',
+    b'perf--branchmapupdate',
     [
         (b'', b'base', [], b'subset of revision to start from'),
         (b'', b'target', [], b'subset of revision to end with'),
@@ -3602,7 +3602,7 @@
 
 
 @command(
-    b'perfbranchmapload',
+    b'perf--branchmapload',
     [
         (b'f', b'filter', b'', b'Specify repoview filter'),
         (b'', b'list', False, b'List brachmap filter caches'),
@@ -3661,7 +3661,7 @@
     fm.end()
 
 
-@command(b'perfloadmarkers')
+@command(b'perf--loadmarkers')
 def perfloadmarkers(ui, repo):
     """benchmark the time to parse the on-disk markers for a repo
 
@@ -3673,7 +3673,7 @@
 
 
 @command(
-    b'perflrucachedict',
+    b'perf--lrucachedict',
     formatteropts
     + [
         (b'', b'costlimit', 0, b'maximum total cost of items in cache'),
@@ -3829,7 +3829,7 @@
 
 
 @command(
-    b'perfwrite',
+    b'perf--write',
     formatteropts
     + [
         (b'', b'write-method', b'write', b'ui write method'),
@@ -3892,7 +3892,7 @@
 
 
 @command(
-    b'perfprogress',
+    b'perf--progress',
     formatteropts
     + [
         (b'', b'topic', b'topic', b'topic for progress messages'),

--- a/tests/test-contrib-perf.t	Tue Jan 19 12:22:05 2021 -0500
+++ b/tests/test-contrib-perf.t	Fri Dec 04 10:11:01 2020 +0100
@@ -78,109 +78,121 @@
   
   list of commands:
   
-   perfaddremove
+   perf--addremove
+                 (no help text available)
+   perf--ancestors
                  (no help text available)
-   perfancestors
+   perf--ancestorset
                  (no help text available)
-   perfancestorset
+   perf--annotate
                  (no help text available)
-   perfannotate  (no help text available)
-   perfbdiff     benchmark a bdiff between revisions
-   perfbookmarks
+   perf--bdiff   benchmark a bdiff between revisions
+   perf--bookmarks
                  benchmark parsing bookmarks from disk to memory
-   perfbranchmap
+   perf--branchmap
                  benchmark the update of a branchmap
-   perfbranchmapload
+   perf--branchmapload
                  benchmark reading the branchmap
-   perfbranchmapupdate
+   perf--branchmapupdate
                  benchmark branchmap update from for <base> revs to <target>
                  revs
-   perfbundleread
+   perf--bundleread
                  Benchmark reading of bundle files.
-   perfcca       (no help text available)
-   perfchangegroupchangelog
+   perf--cca     (no help text available)
+   perf--changegroupchangelog
                  Benchmark producing a changelog group for a changegroup.
-   perfchangeset
+   perf--changeset
+                 (no help text available)
+   perf--ctxfiles
                  (no help text available)
-   perfctxfiles  (no help text available)
-   perfdiffwd    Profile diff of working directory changes
-   perfdirfoldmap
+   perf--diffwd  Profile diff of working directory changes
+   perf--dirfoldmap
                  benchmap a 'dirstate._map.dirfoldmap.get()' request
-   perfdirs      (no help text available)
-   perfdirstate  benchmap the time of various distate operations
-   perfdirstatedirs
+   perf--dirs    (no help text available)
+   perf--dirstate
+                 benchmap the time of various distate operations
+   perf--dirstatedirs
                  benchmap a 'dirstate.hasdir' call from an empty 'dirs' cache
-   perfdirstatefoldmap
+   perf--dirstatefoldmap
                  benchmap a 'dirstate._map.filefoldmap.get()' request
-   perfdirstatewrite
+   perf--dirstatewrite
                  benchmap the time it take to write a dirstate on disk
-   perfdiscovery
+   perf--discovery
                  benchmark discovery between local repo and the peer at given
                  path
-   perffncacheencode
+   perf--fncacheencode
                  (no help text available)
-   perffncacheload
+   perf--fncacheload
                  (no help text available)
-   perffncachewrite
+   perf--fncachewrite
                  (no help text available)
-   perfheads     benchmark the computation of a changelog heads
-   perfhelper-mergecopies
+   perf--heads   benchmark the computation of a changelog heads
+   perf--helper-mergecopies
                  find statistics about potential parameters for
                  'perfmergecopies'
-   perfhelper-pathcopies
+   perf--helper-pathcopies
                  find statistic about potential parameters for the
                  'perftracecopies'
-   perfignore    benchmark operation related to computing ignore
-   perfindex     benchmark index creation time followed by a lookup
-   perflinelogedits
+   perf--ignore  benchmark operation related to computing ignore
+   perf--index   benchmark index creation time followed by a lookup
+   perf--linelogedits
                  (no help text available)
-   perfloadmarkers
+   perf--loadmarkers
                  benchmark the time to parse the on-disk markers for a repo
-   perflog       (no help text available)
-   perflookup    (no help text available)
-   perflrucachedict
+   perf--log     (no help text available)
+   perf--lookup  (no help text available)
+   perf--lrucachedict
                  (no help text available)
-   perfmanifest  benchmark the time to read a manifest from disk and return a
+   perf--manifest
+                 benchmark the time to read a manifest from disk and return a
                  usable
-   perfmergecalculate
+   perf--mergecalculate
                  (no help text available)
-   perfmergecopies
+   perf--mergecopies
                  measure runtime of 'copies.mergecopies'
-   perfmoonwalk  benchmark walking the changelog backwards
-   perfnodelookup
+   perf--moonwalk
+                 benchmark walking the changelog backwards
+   perf--nodelookup
                  (no help text available)
-   perfnodemap   benchmark the time necessary to look up revision from a cold
+   perf--nodemap
+                 benchmark the time necessary to look up revision from a cold
                  nodemap
-   perfparents   benchmark the time necessary to fetch one changeset's parents.
-   perfpathcopies
+   perf--parents
+                 benchmark the time necessary to fetch one changeset's parents.
+   perf--pathcopies
                  benchmark the copy tracing logic
-   perfphases    benchmark phasesets computation
-   perfphasesremote
+   perf--phases  benchmark phasesets computation
+   perf--phasesremote
                  benchmark time needed to analyse phases of the remote server
-   perfprogress  printing of progress bars
-   perfrawfiles  (no help text available)
-   perfrevlogchunks
+   perf--progress
+                 printing of progress bars
+   perf--rawfiles
+                 (no help text available)
+   perf--revlogchunks
                  Benchmark operations on revlog chunks.
-   perfrevlogindex
+   perf--revlogindex
                  Benchmark operations against a revlog index.
-   perfrevlogrevision
+   perf--revlogrevision
                  Benchmark obtaining a revlog revision.
-   perfrevlogrevisions
+   perf--revlogrevisions
                  Benchmark reading a series of revisions from a revlog.
-   perfrevlogwrite
+   perf--revlogwrite
                  Benchmark writing a series of revisions to a revlog.
-   perfrevrange  (no help text available)
-   perfrevset    benchmark the execution time of a revset
-   perfstartup   (no help text available)
-   perfstatus    benchmark the performance of a single status call
-   perftags      (no help text available)
-   perftemplating
+   perf--revrange
+                 (no help text available)
+   perf--revset  benchmark the execution time of a revset
+   perf--startup
+                 (no help text available)
+   perf--status  benchmark the performance of a single status call
+   perf--tags    (no help text available)
+   perf--templating
                  test the rendering time of a given template
-   perfunidiff   benchmark a unified diff between revisions
-   perfvolatilesets
+   perf--unidiff
+                 benchmark a unified diff between revisions
+   perf--volatilesets
                  benchmark the computation of various volatile set
-   perfwalk      (no help text available)
-   perfwrite     microbenchmark ui.write (and others)
+   perf--walk    (no help text available)
+   perf--write   microbenchmark ui.write (and others)
   
   (use 'hg help -v perf' to show built-in aliases and global options)
   $ hg perfaddremove