perf: use a formatter for output
We use a `formatter` object in the perf extensions. This allow the use of
formatted output like json. To avoid adding logic to create a formatter and pass
it around to the timer function in every command, we add a `gettimer` function
in charge of returning a `timer` function as simple as before but embedding an
appropriate formatter.
This new `gettimer` function also return the formatter as it needs to be
explicitly closed at the end of the command.
example output:
$ hg --config ui.formatjson=True perfvolatilesets visible obsolete
[
{
"comb": 0.02,
"count": 126,
"sys": 0.0,
"title": "obsolete",
"user": 0.02,
"wall": 0.0199398994446
},
{
"comb": 0.02,
"count": 117,
"sys": 0.0,
"title": "visible",
"user": 0.02,
"wall": 0.0250301361084
}
]
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
=============================================================================