D4148: perf: add a command to benchmark linelog edits

[quark (Jun Wu)]

quark created this revision.
Herald added a subscriber: mercurial-devel.
Herald added a reviewer: hg-reviewers.

REVISION SUMMARY
  The use pattern of creating a linelog is usually by calling "replacelines"
  multiple times. Add a command to benchmark it.

REPOSITORY
  rHG Mercurial

REVISION DETAIL
  https://phab.mercurial-scm.org/D4148

AFFECTED FILES
  contrib/perf.py

CHANGE DETAILS

diff --git a/contrib/perf.py b/contrib/perf.py
--- a/contrib/perf.py
+++ b/contrib/perf.py
@@ -889,6 +889,34 @@
     timer(lambda: len(repo.lookup(rev)))
     fm.end()
 
+ at command('perflinelogedits',
+         [('n', 'edits', 10000, 'number of edits'),
+          ('', 'max-hunk-lines', 10, 'max lines in a hunk'),
+         ], norepo=True)
+def perflinelogedits(ui, **opts):
+    from mercurial import linelog
+
+    edits = opts['edits']
+    maxhunklines = opts['max_hunk_lines']
+
+    def d():
+        maxb1 = 100000
+        random.seed(0)
+        randint = random.randint
+        currentlines = 0
+        ll = linelog.linelog()
+        for rev in xrange(edits):
+            a1 = randint(0, currentlines)
+            a2 = randint(a1, min(currentlines, a1 + maxhunklines))
+            b1 = randint(0, maxb1)
+            b2 = randint(b1, b1 + maxhunklines)
+            currentlines += (b2 - b1) - (a2 - a1)
+            ll.replacelines(rev, a1, a2, b1, b2)
+
+    timer, fm = gettimer(ui, opts)
+    timer(d)
+    fm.end()
+
 @command('perfrevrange', formatteropts)
 def perfrevrange(ui, repo, *specs, **opts):
     timer, fm = gettimer(ui, opts)



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