# HG changeset patch
# User Boris Feld
# Date 1541498713 -3600
# Tue Nov 06 11:05:13 2018 +0100
# Node ID 71b1cbf7a7b59d06972b18c9f3cab27019b2cb0e
# Parent 59d548edb4ce2dafb989ffc2d0a95fb4bb19d2ee
# EXP-Topic sparse-prefrevlogrevision
# Available At https://bitbucket.org/octobus/mercurial-devel/
# hg pull https://bitbucket.org/octobus/mercurial-devel/ -r
71b1cbf7a7b5
perf: measure slicing time in perfrevlogrevision
Slicing a sparse delta chain can be expensive. We now benchmark the associated
time.
diff --git a/contrib/perf.py b/contrib/perf.py
--- a/contrib/perf.py
+++ b/contrib/perf.py
@@ -1692,10 +1692,11 @@ def perfrevlogrevision(ui, repo, file_,
Obtaining a revlog revision consists of roughly the following steps:
1. Compute the delta chain
-2. Obtain the raw chunks for that delta chain
-3. Decompress each raw chunk
-4. Apply binary patches to obtain fulltext
-5. Verify hash of fulltext
+2. slice the delta chain if applicatble
+3. Obtain the raw chunks for that delta chain
+4. Decompress each raw chunk
+5. Apply binary patches to obtain fulltext
+6. Verify hash of fulltext
This command measures the time spent in each of these phases.
"""
@@ -1749,6 +1750,10 @@ def perfrevlogrevision(ui, repo, file_,
for item in slicedchain:
segmentforrevs(item[0], item[-1])
+def doslice(r, chain, size):
+for s in slicechunk(r, chain, targetsize=size):
+pass
+
def dorawchunks(data, chain):
if not cache:
r.clearcaches()
@@ -1797,11 +1802,18 @@ def perfrevlogrevision(ui, repo, file_,
(lambda: dorevision(), b'full'),
(lambda: dodeltachain(rev), b'deltachain'),
(lambda: doread(chain), b'read'),
+]
+
+if getattr(r, '_withsparseread', False):
+slicing = (lambda: doslice(r, chain, size), b'slice-sparse-chain')
+benches.append(slicing)
+
+benches.extend([
(lambda: dorawchunks(data, slicedchain), b'rawchunks'),
(lambda: dodecompress(rawchunks), b'decompress'),
(lambda: dopatch(text, bins), b'patch'),
(lambda: dohash(text), b'hash'),
-]
+])
timer, fm = gettimer(ui, opts)
for fn, title in benches:
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