Re: [PATCH v5 00/11] add performance tracing facility

[Karsten Blees <karsten.blees@gmail.com>]

Am 12.06.2014 20:30, schrieb Junio C Hamano:
> Karsten Blees <karsten.blees@gmail.com> writes:
> 
>> Here's v5 of the performance tracing patch series, now including a bunch of cleanups and adding timestamp, file and line to all trace output.
>>
>> I'm particularly interested in feedback for the output format. As file names have different lengths, printing file:line as prefix results in unaligned output:
>>
>>  > GIT_TRACE=1 git stash list
>>  00:12:10.544266 git.c:512 trace: exec: 'git-stash' 'list'
>>  00:12:10.544266 run-command.c:337 trace: run_command: 'git-stash' 'list'
>>  00:12:10.649779 git.c:312 trace: built-in: git 'rev-parse' '--git-dir'
>>
>> We could add separators to make it easier to parse, e.g.:
>>
>>  > GIT_TRACE=1 git stash list
>>  [00:12:10.544266 git.c:512] trace: exec: 'git-stash' 'list'
>>  [00:12:10.544266 run-command.c:337] trace: run_command: 'git-stash' 'list'
>>  [00:12:10.649779 git.c:312] trace: built-in: git 'rev-parse' '--git-dir'
> 
> This is easier to parse if " " and ":" are found in the names of
> _our_ source files and "]" isn't, but is that really the case?
> 

By "parsing" I actually meant the HumanEye (tm) parser, not lex/yacc and
friends ("[]" just make nice recognizable separators).

However, I think it shouldn't be too complicated to properly align the output,
at least for the majority of 'short' file names in the git code base. E.g.:

00:12:10.544266 git.c:512                trace: exec: 'git-stash' 'list'
00:12:10.544266 run-command.c:337        trace: run_command: 'git-stash' 'list'
00:12:10.649779 git.c:312                trace: built-in: git 'rev-parse' '--git-dir'

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