Mercurial > public > mercurial-scm > hg

comparison mercurial/commands.py @ 20293:2f6b3900be64

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
cat: increase perf when catting single files Special case the single file case in hg cat. This allows us to avoid parsing the manifest, which shaves 15% off hg cat perf. This is worth it, since automation often uses hg cat for retrieving single files.
author Durham Goode <durham@fb.com>
date Tue, 14 Jan 2014 13:38:16 -0800
parents 2cfb720592fe
children a6cf48b2880d 7f865a94691e
comparison
equal deleted inserted replaced
20292:8dc254198a8f 20293:2f6b3900be64
1166 Returns 0 on success. 1166 Returns 0 on success.
1167 """ 1167 """
1168 ctx = scmutil.revsingle(repo, opts.get('rev')) 1168 ctx = scmutil.revsingle(repo, opts.get('rev'))
1169 err = 1 1169 err = 1
1170 m = scmutil.match(ctx, (file1,) + pats, opts) 1170 m = scmutil.match(ctx, (file1,) + pats, opts)
1171 for abs in ctx.walk(m): 1171
1172 def write(path):
1172 fp = cmdutil.makefileobj(repo, opts.get('output'), ctx.node(), 1173 fp = cmdutil.makefileobj(repo, opts.get('output'), ctx.node(),
1173 pathname=abs) 1174 pathname=path)
1174 data = ctx[abs].data() 1175 data = ctx[path].data()
1175 if opts.get('decode'): 1176 if opts.get('decode'):
1176 data = repo.wwritedata(abs, data) 1177 data = repo.wwritedata(path, data)
1177 fp.write(data) 1178 fp.write(data)
1178 fp.close() 1179 fp.close()
1180
1181 # Automation often uses hg cat on single files, so special case it
1182 # for performance to avoid the cost of parsing the manifest.
1183 if len(m.files()) == 1 and not m.anypats():
1184 file = m.files()[0]
1185 mf = repo.manifest
1186 mfnode = ctx._changeset[0]
1187 if mf.find(mfnode, file)[0]:
1188 write(file)
1189 return 0
1190
1191 for abs in ctx.walk(m):
1192 write(abs)
1179 err = 0 1193 err = 0
1180 return err 1194 return err
1181 1195
1182 @command('^clone', 1196 @command('^clone',
1183 [('U', 'noupdate', None, 1197 [('U', 'noupdate', None,