streamclone: stop listing files for entries that have no volatile files
This will save a lot of python related time.
This significantly boost performance. The following number comes from a large
private repository using perf::stream-locked-section:
base-line: 35.04 seconds
prev-change: 24.51 seconds (-30%)
prev-change: 20.88 seconds (-40%)
prev-change: 14.22 seconds (-60%)
this-change: 11.58 seconds (-67% from baseline; -18% from prev)
head: 1.2
branch:
locks: strict
access list:
symbolic names:
MYBRANCH1_2: 1.1.2.2.0.2
MYBRANCH1_1: 1.1.0.4
MYBRANCH1: 1.1.0.2
keyword substitution: kv
total revisions: 8; selected revisions: 8
description:
----------------------------
revision 1.2
date: 2009/04/02 07:00:32; author: user; state: Exp; lines: +1 -1; kopt: kv; commitid: 14d449d462903487; mergepoint: 1.1.2.2.2.1; filename: foo.txt;
merge
----------------------------
revision 1.1
date: 2009/04/02 06:50:43; author: user; state: Exp; kopt: kv; commitid: 17ac49d460432d04; filename: foo.txt;
branches: 1.1.2; 1.1.4;
foo.txt
----------------------------
revision 1.1.4.2
date: 2009/04/02 07:02:51; author: user; state: Exp; lines: +1 -0; kopt: kv; commitid: 170049d4631b364d; mergepoint: 1.1.2.2; filename: foo.txt;
merge
----------------------------
revision 1.1.4.1
date: 2009/04/02 06:53:42; author: user; state: Exp; lines: +1 -1; kopt: kv; commitid: dc849d460f52f49; filename: foo.txt;
quux
----------------------------
revision 1.1.2.2
date: 2009/04/02 06:53:20; author: user; state: Exp; lines: +1 -1; kopt: kv; commitid: 8ec49d460e02f04; filename: foo.txt;
branches: 1.1.2.2.2;
baz
----------------------------
revision 1.1.2.1
date: 2009/04/02 06:52:38; author: user; state: Exp; lines: +1 -1; kopt: kv; commitid: d5049d460b62e7b; filename: foo.txt;
bar
----------------------------
revision 1.1.2.2.2.1
date: 2009/04/02 06:55:42; author: user; state: Exp; lines: +1 -1; kopt: kv; commitid: 11c849d4616d30d1; filename: foo.txt;
bazzie
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