Re: [PATCH] status: hint the user about -uno if read_directory takes too long

> Torsten Bögershausen <tboegi@web.de> writes:
> 
>> > Thanks, I like that much better than mine
>> > (and expere is probably a word not yet invented)
> OK, then how about redoing Duy's patch like this on top?
> 
> I've moved the timing collection from the caller to callee, and I
> think the result is more readable.  The message looked easier to see
> with a leading blank line, so I added one.
> 
> -- >8 --
> From: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
> Date: Wed, 13 Mar 2013 19:59:16 +0700
> Subject: [PATCH] status: advise to consider use of -u when read_directory takes too long
> 
> Introduce advice.statusUoption to suggest considering use of -u to
> strike different trade-off when it took more than 2 seconds to
> enumerate untracked/ignored files.
> 
> Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
> Signed-off-by: Junio C Hamano <gitster@pobox.com>
> ---
>  Documentation/config.txt |  4 ++++
>  advice.c                 |  2 ++
>  advice.h                 |  1 +
>  t/t7060-wtstatus.sh      |  1 +
>  t/t7508-status.sh        |  1 +
>  t/t7512-status-help.sh   |  1 +
>  wt-status.c              | 21 +++++++++++++++++++++
>  wt-status.h              |  1 +
>  8 files changed, 32 insertions(+)
> 
> diff --git a/Documentation/config.txt b/Documentation/config.txt
> index d1de857..a16eda5 100644
> --- a/Documentation/config.txt
> +++ b/Documentation/config.txt
> @@ -163,6 +163,10 @@ advice.*::
>  		state in the output of linkgit:git-status[1] and in
>  		the template shown when writing commit messages in
>  		linkgit:git-commit[1].
> +	statusUoption::
> +		Advise to consider using the `-u` option to linkgit:git-status[1]
> +		when the command takes more than 2 seconds to enumerate untracked
> +		files.
>  	commitBeforeMerge::
>  		Advice shown when linkgit:git-merge[1] refuses to
>  		merge to avoid overwriting local changes.
> diff --git a/advice.c b/advice.c
> index edfbd4a..015011f 100644
> --- a/advice.c
> +++ b/advice.c
> @@ -5,6 +5,7 @@ int advice_push_non_ff_current = 1;
>  int advice_push_non_ff_default = 1;
>  int advice_push_non_ff_matching = 1;
>  int advice_status_hints = 1;
> +int advice_status_u_option = 1;
>  int advice_commit_before_merge = 1;
>  int advice_resolve_conflict = 1;
>  int advice_implicit_identity = 1;
> @@ -19,6 +20,7 @@ static struct {
>  	{ "pushnonffdefault", &advice_push_non_ff_default },
>  	{ "pushnonffmatching", &advice_push_non_ff_matching },
>  	{ "statushints", &advice_status_hints },
> +	{ "statusuoption", &advice_status_u_option },
>  	{ "commitbeforemerge", &advice_commit_before_merge },
>  	{ "resolveconflict", &advice_resolve_conflict },
>  	{ "implicitidentity", &advice_implicit_identity },
> diff --git a/advice.h b/advice.h
> index f3cdbbf..e3e665d 100644
> --- a/advice.h
> +++ b/advice.h
> @@ -8,6 +8,7 @@ extern int advice_push_non_ff_current;
>  extern int advice_push_non_ff_default;
>  extern int advice_push_non_ff_matching;
>  extern int advice_status_hints;
> +extern int advice_status_u_option;
>  extern int advice_commit_before_merge;
>  extern int advice_resolve_conflict;
>  extern int advice_implicit_identity;
> diff --git a/t/t7060-wtstatus.sh b/t/t7060-wtstatus.sh
> index f4f38a5..52ef06b 100755
> --- a/t/t7060-wtstatus.sh
> +++ b/t/t7060-wtstatus.sh
> @@ -5,6 +5,7 @@ test_description='basic work tree status reporting'
>  . ./test-lib.sh
>  
>  test_expect_success setup '
> +	git config --global advice.statusuoption false &&
>  	test_commit A &&
>  	test_commit B oneside added &&
>  	git checkout A^0 &&
> diff --git a/t/t7508-status.sh b/t/t7508-status.sh
> index e313ef1..15e063a 100755
> --- a/t/t7508-status.sh
> +++ b/t/t7508-status.sh
> @@ -8,6 +8,7 @@ test_description='git status'
>  . ./test-lib.sh
>  
>  test_expect_success 'status -h in broken repository' '
> +	git config --global advice.statusuoption false &&
>  	mkdir broken &&
>  	test_when_finished "rm -fr broken" &&
>  	(
> diff --git a/t/t7512-status-help.sh b/t/t7512-status-help.sh
> index b3f6eb9..2d53e03 100755
> --- a/t/t7512-status-help.sh
> +++ b/t/t7512-status-help.sh
> @@ -14,6 +14,7 @@ test_description='git status advices'
>  set_fake_editor
>  
>  test_expect_success 'prepare for conflicts' '
> +	git config --global advice.statusuoption false &&
>  	test_commit init main.txt init &&
>  	git branch conflicts &&
>  	test_commit on_master main.txt on_master &&
> diff --git a/wt-status.c b/wt-status.c
> index 2a9658b..6e75468 100644
> --- a/wt-status.c
> +++ b/wt-status.c
> @@ -496,9 +496,14 @@ static void wt_status_collect_untracked(struct wt_status *s)
>  {
>  	int i;
>  	struct dir_struct dir;
> +	struct timeval t_begin;
>  
>  	if (!s->show_untracked_files)
>  		return;
> +
> +	if (advice_status_u_option)
> +		gettimeofday(&t_begin, NULL);
> +
>  	memset(&dir, 0, sizeof(dir));
>  	if (s->show_untracked_files != SHOW_ALL_UNTRACKED_FILES)
>  		dir.flags |=
> @@ -528,6 +533,14 @@ static void wt_status_collect_untracked(struct wt_status *s)
>  	}
>  
>  	free(dir.entries);
> +
> +	if (advice_status_u_option) {
> +		struct timeval t_end;
> +		gettimeofday(&t_end, NULL);
> +		s->untracked_in_ms =
> +			(uint64_t)t_end.tv_sec * 1000 + t_end.tv_usec / 1000 -
> +			((uint64_t)t_begin.tv_sec * 1000 + t_begin.tv_usec / 1000);
> +	}
>  }
>  
>  void wt_status_collect(struct wt_status *s)
> @@ -1011,6 +1024,14 @@ void wt_status_print(struct wt_status *s)
>  		wt_status_print_other(s, &s->untracked, _("Untracked files"), "add");
>  		if (s->show_ignored_files)
>  			wt_status_print_other(s, &s->ignored, _("Ignored files"), "add -f");
> +		if (advice_status_u_option && 2000 < s->untracked_in_ms) {
> +			status_printf_ln(s, GIT_COLOR_NORMAL, "");
> +			status_printf_ln(s, GIT_COLOR_NORMAL,
> +				 _("It took %.2f seconds to enumerate untracked files."),
> +				 s->untracked_in_ms / 1000.0);
> +			status_printf_ln(s, GIT_COLOR_NORMAL,
> +				 _("Consider the -u option for a possible speed-up?"));
> +		}
>  	} else if (s->commitable)
>  		status_printf_ln(s, GIT_COLOR_NORMAL, _("Untracked files not listed%s"),
>  			advice_status_hints
> diff --git a/wt-status.h b/wt-status.h
> index 236b41f..09420d0 100644
> --- a/wt-status.h
> +++ b/wt-status.h
> @@ -69,6 +69,7 @@ struct wt_status {
>  	struct string_list change;
>  	struct string_list untracked;
>  	struct string_list ignored;
> +	uint32_t untracked_in_ms;
>  };
>  
>  struct wt_status_state {
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