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From: Phillip Wood <phillip.wood123@gmail.com>
To: "Ævar Arnfjörð Bjarmason" <avarab@gmail.com>, git@vger.kernel.org
Cc: "Junio C Hamano" <gitster@pobox.com>,
	"SZEDER Gábor" <szeder.dev@gmail.com>,
	"René Scharfe" <l.s.r@web.de>
Subject: Re: [PATCH 2/3] midx: don't provide a total for QSORT() progress
Date: Thu, 5 Aug 2021 16:07:14 +0100	[thread overview]
Message-ID: <5cf55741-d06a-f8f3-5027-02c5e1dfa672@gmail.com> (raw)
In-Reply-To: <patch-2.3-3411fe0515-20210722T121801Z-avarab@gmail.com>

On 22/07/2021 13:20, Ævar Arnfjörð Bjarmason wrote:
> The quicksort algorithm can be anywhere between O(n) and O(n^2), so
> providing a "num objects" as a total means that in some cases we're
> going to go past 100%.

Being pedantic QSORT() is not necessarily a quicksort, for example 
compact/qsort_s.c implements a merge sort.

I'm confused as to how we go past 100% when we only call 
display_progress(progress, 0) and then stop_progress(). If my reading of 
progress.c is correct then this change means we'll stop displaying a 
percentage as progress->total will be zero in

static void display(struct progress *progress, uint64_t n, const char *done)
{
	/* ... */
	if (progress->total) {
		unsigned percent = n * 100 / progress->total;
		if (percent != progress->last_percent || progress_update) {
			progress->last_percent = percent;

			strbuf_reset(counters_sb);
			strbuf_addf(counters_sb,
				    "%3u%% (%"PRIuMAX"/%"PRIuMAX")%s", percent,
				    (uintmax_t)n, (uintmax_t)progress->total,
				    tp);
			show_update = 1;
		}
	} else if (progress_update) {
		strbuf_reset(counters_sb);
		strbuf_addf(counters_sb, "%"PRIuMAX"%s", (uintmax_t)n, tp);
		show_update = 1;
	}
	/* ... */
}

Best Wishes

Phillip

> This fixes a logic error in 5ae18df9d8e (midx: during verify group
> objects by packfile to speed verification, 2019-03-21), which in turn
> seems to have been diligently copied from my own logic error in the
> commit-graph.c code, see 890226ccb57 (commit-graph write: add
> itermediate progress, 2019-01-19).
> 
> That commit-graph code of mine was removed in
> 1cbdbf3bef7 (commit-graph: drop count_distinct_commits() function,
> 2020-12-07), so we don't need to fix that too.
> 
> Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
> ---
>   midx.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/midx.c b/midx.c
> index 9a35b0255d..eaae75ab19 100644
> --- a/midx.c
> +++ b/midx.c
> @@ -1291,7 +1291,7 @@ int verify_midx_file(struct repository *r, const char *object_dir, unsigned flag
>   
>   	if (flags & MIDX_PROGRESS)
>   		progress = start_sparse_progress(_("Sorting objects by packfile"),
> -						 m->num_objects);
> +						 0);
>   	display_progress(progress, 0); /* TODO: Measure QSORT() progress */
>   	QSORT(pairs, m->num_objects, compare_pair_pos_vs_id);
>   	stop_progress(&progress);
> 

  parent reply	other threads:[~2021-08-05 15:07 UTC|newest]

Thread overview: 186+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-06-20 20:02 [PATCH 0/7] progress: verify progress counters in the test suite SZEDER Gábor
2021-06-20 20:02 ` [PATCH 1/7] progress: introduce GIT_TEST_CHECK_PROGRESS to verify progress counters SZEDER Gábor
2021-06-21  7:09   ` Ævar Arnfjörð Bjarmason
2021-06-22 15:55   ` Taylor Blau
2021-06-20 20:02 ` [PATCH 2/7] progress: catch nested/overlapping progresses with GIT_TEST_CHECK_PROGRESS SZEDER Gábor
2021-06-22 16:00   ` Taylor Blau
2021-08-30 21:15     ` SZEDER Gábor
2021-06-20 20:02 ` [PATCH 3/7] progress: catch backwards counting " SZEDER Gábor
2021-06-20 20:03 ` [PATCH 4/7] commit-graph: fix bogus counter in "Scanning merged commits" progress line SZEDER Gábor
2021-06-20 22:13   ` Ævar Arnfjörð Bjarmason
2021-06-21 18:32     ` René Scharfe
2021-06-21 20:08       ` Ævar Arnfjörð Bjarmason
2021-06-26  8:27         ` René Scharfe
2021-06-26 14:11           ` Ævar Arnfjörð Bjarmason
2021-06-26 20:22             ` René Scharfe
2021-06-26 21:38               ` Ævar Arnfjörð Bjarmason
2021-07-04 12:15                 ` René Scharfe
2021-07-05 14:09                   ` Junio C Hamano
2021-07-05 23:28                   ` Ævar Arnfjörð Bjarmason
2021-07-06 16:02                     ` René Scharfe
2021-06-27 17:31               ` Felipe Contreras
2021-06-20 20:03 ` [PATCH 5/7] entry: show finer-grained counter in "Filtering content" " SZEDER Gábor
2021-06-20 20:03 ` [PATCH 6/7] [RFC] entry: don't show "Filtering content: ... done." line in case of errors SZEDER Gábor
2021-06-21 18:32   ` René Scharfe
2021-06-23  1:52     ` Taylor Blau
2021-08-30 21:17       ` SZEDER Gábor
2021-06-20 20:03 ` [PATCH 7/7] test-lib: enable GIT_TEST_CHECK_PROGRESS by default SZEDER Gábor
2021-06-21  0:59 ` [PATCH 0/7] progress: verify progress counters in the test suite Ævar Arnfjörð Bjarmason
2021-06-23  2:04   ` Taylor Blau
2021-06-23 17:48     ` [PATCH 00/25] progress.c: various fixes + SZEDER's RFC code Ævar Arnfjörð Bjarmason
2021-06-23 17:48       ` [PATCH 01/25] progress.c tests: fix breakage with COLUMNS != 80 Ævar Arnfjörð Bjarmason
2021-06-23 17:48       ` [PATCH 02/25] progress.c tests: make start/stop verbs on stdin Ævar Arnfjörð Bjarmason
2021-06-23 17:48       ` [PATCH 03/25] progress.c tests: test some invalid usage Ævar Arnfjörð Bjarmason
2021-06-23 17:48       ` [PATCH 04/25] progress.c tests: add a "signal" verb Ævar Arnfjörð Bjarmason
2021-06-23 17:48       ` [PATCH 05/25] progress.c: move signal handler functions lower Ævar Arnfjörð Bjarmason
2021-06-23 17:48       ` [PATCH 06/25] progress.c: call progress_interval() from progress_test_force_update() Ævar Arnfjörð Bjarmason
2021-06-23 17:48       ` [PATCH 07/25] progress.c: stop eagerly fflush(stderr) when not a terminal Ævar Arnfjörð Bjarmason
2021-06-23 17:48       ` [PATCH 08/25] progress.c: add temporary variable from progress struct Ævar Arnfjörð Bjarmason
2021-06-23 17:48       ` [PATCH 09/25] midx perf: add a perf test for multi-pack-index Ævar Arnfjörð Bjarmason
2021-06-23 17:48       ` [PATCH 10/25] progress.c: remove the "sparse" mode nano-optimization Ævar Arnfjörð Bjarmason
2021-06-23 17:48       ` [PATCH 11/25] pack-bitmap-write.c: add a missing stop_progress() Ævar Arnfjörð Bjarmason
2021-09-17  5:14         ` SZEDER Gábor
2021-09-17  5:56           ` Ævar Arnfjörð Bjarmason
2021-09-17 21:38             ` SZEDER Gábor
2021-06-23 17:48       ` [PATCH 12/25] progress.c: add & assert a "global_progress" variable Ævar Arnfjörð Bjarmason
2021-09-16 18:31         ` SZEDER Gábor
2021-06-23 17:48       ` [PATCH 13/25] progress.[ch]: move the "struct progress" to the header Ævar Arnfjörð Bjarmason
2021-09-16 19:42         ` SZEDER Gábor
2021-06-23 17:48       ` [PATCH 14/25] progress.[ch]: move test-only code away from "extern" variables Ævar Arnfjörð Bjarmason
2021-06-23 17:48       ` [PATCH 15/25] progress.c: pass "is done?" (again) to display() Ævar Arnfjörð Bjarmason
2021-06-23 17:48       ` [PATCH 16/25] progress.[ch]: convert "title" to "struct strbuf" Ævar Arnfjörð Bjarmason
2021-06-23 17:48       ` [PATCH 17/25] progress.c: refactor display() for less confusion, and fix bug Ævar Arnfjörð Bjarmason
2021-06-23 17:48       ` [PATCH 18/25] progress.c: emit progress on first signal, show "stalled" Ævar Arnfjörð Bjarmason
2021-09-16 18:37         ` SZEDER Gábor
2021-06-23 17:48       ` [PATCH 19/25] commit-graph: fix bogus counter in "Scanning merged commits" progress line Ævar Arnfjörð Bjarmason
2021-06-23 17:48       ` [PATCH 20/25] midx: don't provide a total for QSORT() progress Ævar Arnfjörð Bjarmason
2021-06-23 17:48       ` [PATCH 21/25] entry: show finer-grained counter in "Filtering content" progress line Ævar Arnfjörð Bjarmason
2021-06-23 17:48       ` [PATCH 22/25] progress.c: add a stop_progress_early() function Ævar Arnfjörð Bjarmason
2021-06-24 10:35         ` Ævar Arnfjörð Bjarmason
2021-06-25  1:24         ` Andrei Rybak
2021-06-23 17:48       ` [PATCH 23/25] entry: deal with unexpected "Filtering content" total Ævar Arnfjörð Bjarmason
2021-06-23 17:48       ` [RFC/PATCH 24/25] progress: assert last update in stop_progress() Ævar Arnfjörð Bjarmason
2021-06-23 17:48       ` [RFC/PATCH 25/25] progress: assert counting upwards in display() Ævar Arnfjörð Bjarmason
2021-06-23 17:59       ` [PATCH 00/25] progress.c: various fixes + SZEDER's RFC code Randall S. Becker
2021-06-23 20:01         ` Ævar Arnfjörð Bjarmason
2021-06-23 20:25           ` Randall S. Becker
2021-06-23 21:57 ` [PATCH 0/4] WIP/POC check isatty(2)-protected progress lines SZEDER Gábor
2021-06-23 21:57   ` [PATCH 1/4] WIP progress, isatty(2), hidden progress lnies for GIT_TEST_CHECK_PROGRESS SZEDER Gábor
2021-06-23 21:57   ` [PATCH 2/4] blame: fix progress total with line ranges SZEDER Gábor
2021-06-23 21:57   ` [PATCH 3/4] read-cache: avoid overlapping progress lines SZEDER Gábor
2021-06-23 21:57   ` [PATCH 4/4] preload-index: fix "Refreshing index" progress line SZEDER Gábor
2021-06-23 22:11   ` [PATCH 0/4] WIP/POC check isatty(2)-protected progress lines SZEDER Gábor
2021-06-24 10:43     ` Ævar Arnfjörð Bjarmason
2021-06-24 10:45   ` Ævar Arnfjörð Bjarmason
2021-07-22 12:20 ` [PATCH 0/3] progress.c API users: fix bogus counting Ævar Arnfjörð Bjarmason
2021-07-22 12:20   ` [PATCH 1/3] commit-graph: fix bogus counter in "Scanning merged commits" progress line Ævar Arnfjörð Bjarmason
2021-07-23 21:55     ` Junio C Hamano
2021-08-02 21:07     ` SZEDER Gábor
2021-07-22 12:20   ` [PATCH 2/3] midx: don't provide a total for QSORT() progress Ævar Arnfjörð Bjarmason
2021-07-23 21:56     ` Junio C Hamano
2021-08-05 15:07     ` Phillip Wood [this message]
2021-08-05 19:07       ` Ævar Arnfjörð Bjarmason
2021-07-22 12:20   ` [PATCH 3/3] entry: show finer-grained counter in "Filtering content" progress line Ævar Arnfjörð Bjarmason
2021-07-23 22:01     ` Junio C Hamano
2021-08-02 22:05       ` SZEDER Gábor
2021-08-02 21:48     ` SZEDER Gábor
2021-08-05 11:01   ` [PATCH v2 0/3] progress.c API users: fix bogus counting Ævar Arnfjörð Bjarmason
2021-08-05 11:01     ` [PATCH v2 1/3] commit-graph: fix bogus counter in "Scanning merged commits" progress line Ævar Arnfjörð Bjarmason
2021-08-05 11:01     ` [PATCH v2 2/3] midx: don't provide a total for QSORT() progress Ævar Arnfjörð Bjarmason
2021-08-05 11:01     ` [PATCH v2 3/3] entry: show finer-grained counter in "Filtering content" progress line Ævar Arnfjörð Bjarmason
2021-08-23 10:29     ` [PATCH v3 0/2] progress.c API users: fix bogus counting Ævar Arnfjörð Bjarmason
2021-08-23 10:29       ` [PATCH v3 1/2] commit-graph: fix bogus counter in "Scanning merged commits" progress line Ævar Arnfjörð Bjarmason
2021-08-23 10:29       ` [PATCH v3 2/2] entry: show finer-grained counter in "Filtering content" " Ævar Arnfjörð Bjarmason
2021-09-09  1:10       ` [PATCH v4 0/2] progress.c API users: fix bogus counting Ævar Arnfjörð Bjarmason
2021-09-09  1:10         ` [PATCH v4 1/2] commit-graph: fix bogus counter in "Scanning merged commits" progress line Ævar Arnfjörð Bjarmason
2021-09-09  1:10         ` [PATCH v4 2/2] entry: show finer-grained counter in "Filtering content" " Ævar Arnfjörð Bjarmason
2021-09-09 20:02         ` [PATCH v4 0/2] progress.c API users: fix bogus counting Junio C Hamano
2021-07-22 12:54 ` [PATCH 0/8] progress: assert "global_progress" + test fixes / cleanup Ævar Arnfjörð Bjarmason
2021-07-22 12:54   ` [PATCH 1/8] progress.c tests: make start/stop verbs on stdin Ævar Arnfjörð Bjarmason
2021-07-22 12:55   ` [PATCH 2/8] progress.c tests: test some invalid usage Ævar Arnfjörð Bjarmason
2021-07-22 12:55   ` [PATCH 3/8] progress.c: move signal handler functions lower Ævar Arnfjörð Bjarmason
2021-07-22 12:55   ` [PATCH 4/8] progress.c: call progress_interval() from progress_test_force_update() Ævar Arnfjörð Bjarmason
2021-07-22 12:55   ` [PATCH 5/8] progress.c: stop eagerly fflush(stderr) when not a terminal Ævar Arnfjörð Bjarmason
2021-07-22 12:55   ` [PATCH 6/8] progress.c: add temporary variable from progress struct Ævar Arnfjörð Bjarmason
2021-07-22 12:55   ` [PATCH 7/8] pack-bitmap-write.c: add a missing stop_progress() Ævar Arnfjörð Bjarmason
2021-07-22 12:55   ` [PATCH 8/8] progress.c: add & assert a "global_progress" variable Ævar Arnfjörð Bjarmason
2021-09-16 21:34     ` [PATCH 12/25] " Ævar Arnfjörð Bjarmason
2021-07-23 22:02   ` [PATCH 0/8] progress: assert "global_progress" + test fixes / cleanup Junio C Hamano
2021-09-20 23:09   ` [PATCH v2 " Ævar Arnfjörð Bjarmason
2021-09-20 23:09     ` [PATCH v2 1/8] progress.c tests: make start/stop verbs on stdin Ævar Arnfjörð Bjarmason
2021-10-08  3:43       ` Emily Shaffer
2021-09-20 23:09     ` [PATCH v2 2/8] progress.c tests: test some invalid usage Ævar Arnfjörð Bjarmason
2021-10-08  3:53       ` Emily Shaffer
2021-09-20 23:09     ` [PATCH v2 3/8] progress.c: move signal handler functions lower Ævar Arnfjörð Bjarmason
2021-09-20 23:09     ` [PATCH v2 4/8] progress.c: call progress_interval() from progress_test_force_update() Ævar Arnfjörð Bjarmason
2021-09-20 23:09     ` [PATCH v2 5/8] progress.c: stop eagerly fflush(stderr) when not a terminal Ævar Arnfjörð Bjarmason
2021-10-08  3:59       ` Emily Shaffer
2021-10-08  7:01         ` Ævar Arnfjörð Bjarmason
2021-09-20 23:09     ` [PATCH v2 6/8] progress.c: add temporary variable from progress struct Ævar Arnfjörð Bjarmason
2021-10-08  4:02       ` Emily Shaffer
2021-09-20 23:09     ` [PATCH v2 7/8] pack-bitmap-write.c: add a missing stop_progress() Ævar Arnfjörð Bjarmason
2021-10-08  4:04       ` Emily Shaffer
2021-10-08 12:14         ` Ævar Arnfjörð Bjarmason
2021-10-10 21:29       ` SZEDER Gábor
2021-09-20 23:09     ` [PATCH v2 8/8] progress.c: add & assert a "global_progress" variable Ævar Arnfjörð Bjarmason
2021-10-08  4:18       ` Emily Shaffer
2021-10-08  7:15         ` Ævar Arnfjörð Bjarmason
2021-10-13 22:28     ` [PATCH v3 00/10] progress: assert "global_progress" + test fixes / cleanup Ævar Arnfjörð Bjarmason
2021-10-13 22:28       ` [PATCH v3 01/10] leak tests: fix a memory leaks in "test-progress" helper Ævar Arnfjörð Bjarmason
2021-10-13 22:28       ` [PATCH v3 02/10] progress.c test helper: add missing braces Ævar Arnfjörð Bjarmason
2021-10-13 22:28       ` [PATCH v3 03/10] progress.c tests: make start/stop verbs on stdin Ævar Arnfjörð Bjarmason
2021-10-21 22:30         ` SZEDER Gábor
2021-10-22 14:18           ` Ævar Arnfjörð Bjarmason
2021-10-22 22:14             ` Taylor Blau
2021-10-24 20:10               ` SZEDER Gábor
2021-10-22  3:34         ` Emily Shaffer
2021-10-13 22:28       ` [PATCH v3 04/10] progress.c tests: test some invalid usage Ævar Arnfjörð Bjarmason
2021-10-13 22:28       ` [PATCH v3 05/10] progress.c: move signal handler functions lower Ævar Arnfjörð Bjarmason
2021-10-13 22:28       ` [PATCH v3 06/10] progress.c: call progress_interval() from progress_test_force_update() Ævar Arnfjörð Bjarmason
2021-10-22 22:28         ` Taylor Blau
2021-10-13 22:28       ` [PATCH v3 07/10] progress.c: add temporary variable from progress struct Ævar Arnfjörð Bjarmason
2021-10-22 22:37         ` Taylor Blau
2021-10-13 22:28       ` [PATCH v3 08/10] pack-bitmap-write.c: don't return without stop_progress() Ævar Arnfjörð Bjarmason
2021-10-22  3:37         ` Emily Shaffer
2021-10-22 22:47         ` Taylor Blau
2021-10-13 22:28       ` [PATCH v3 09/10] various *.c: use isatty(1|2), not isatty(STDIN_FILENO|STDERR_FILENO) Ævar Arnfjörð Bjarmason
2021-10-22  3:39         ` Emily Shaffer
2021-10-13 22:28       ` [PATCH v3 10/10] progress.c: add & assert a "global_progress" variable Ævar Arnfjörð Bjarmason
2021-10-22  3:42         ` Emily Shaffer
2021-10-25  5:02         ` SZEDER Gábor
2021-10-25  9:38           ` Junio C Hamano
2021-12-02 23:14             ` SZEDER Gábor
2021-12-03 10:29               ` Ævar Arnfjörð Bjarmason
2021-10-25 11:06           ` Ævar Arnfjörð Bjarmason
2021-10-22  3:44       ` [PATCH v3 00/10] progress: assert "global_progress" + test fixes / cleanup Emily Shaffer
2021-10-22 14:21         ` Ævar Arnfjörð Bjarmason
2021-10-25 11:24       ` [PATCH v4 0/8] " Ævar Arnfjörð Bjarmason
2021-10-25 11:25         ` [PATCH v4 1/8] leak tests: fix a memory leaks in "test-progress" helper Ævar Arnfjörð Bjarmason
2021-10-25 11:25         ` [PATCH v4 2/8] progress.c test helper: add missing braces Ævar Arnfjörð Bjarmason
2021-10-25 11:25         ` [PATCH v4 3/8] progress.c tests: make start/stop commands on stdin Ævar Arnfjörð Bjarmason
2021-10-25 11:25         ` [PATCH v4 4/8] progress.c tests: test some invalid usage Ævar Arnfjörð Bjarmason
2021-10-25 11:25         ` [PATCH v4 5/8] progress.c: add temporary variable from progress struct Ævar Arnfjörð Bjarmason
2021-10-25 11:25         ` [PATCH v4 6/8] pack-bitmap-write.c: don't return without stop_progress() Ævar Arnfjörð Bjarmason
2021-10-25 11:25         ` [PATCH v4 7/8] various *.c: use isatty(1|2), not isatty(STDIN_FILENO|STDERR_FILENO) Ævar Arnfjörð Bjarmason
2021-10-25 11:25         ` [PATCH v4 8/8] progress.c: add & assert a "global_progress" variable Ævar Arnfjörð Bjarmason
2021-10-25 11:53           ` Johannes Sixt
2021-10-25 12:29             ` Ævar Arnfjörð Bjarmason
2021-11-01 19:09         ` [PATCH v5 0/8] progress: assert "global_progress" + test fixes / cleanup Ævar Arnfjörð Bjarmason
2021-11-01 19:09           ` [PATCH v5 1/8] leak tests: fix a memory leaks in "test-progress" helper Ævar Arnfjörð Bjarmason
2021-11-01 19:09           ` [PATCH v5 2/8] progress.c test helper: add missing braces Ævar Arnfjörð Bjarmason
2021-11-01 19:09           ` [PATCH v5 3/8] progress.c tests: make start/stop commands on stdin Ævar Arnfjörð Bjarmason
2021-11-01 19:09           ` [PATCH v5 4/8] progress.c tests: test some invalid usage Ævar Arnfjörð Bjarmason
2021-11-01 19:09           ` [PATCH v5 5/8] progress.c: add temporary variable from progress struct Ævar Arnfjörð Bjarmason
2021-11-01 19:09           ` [PATCH v5 6/8] pack-bitmap-write.c: don't return without stop_progress() Ævar Arnfjörð Bjarmason
2021-11-01 19:09           ` [PATCH v5 7/8] various *.c: use isatty(1|2), not isatty(STDIN_FILENO|STDERR_FILENO) Ævar Arnfjörð Bjarmason
2021-11-02  0:58             ` Carlo Arenas
2021-11-01 19:09           ` [PATCH v5 8/8] progress.c: add & assert a "global_progress" variable Ævar Arnfjörð Bjarmason
2021-11-02 12:27           ` [PATCH v6 0/8] progress: assert "global_progress" + test fixes / cleanup Ævar Arnfjörð Bjarmason
2021-11-02 12:27             ` [PATCH v6 1/8] leak tests: fix a memory leaks in "test-progress" helper Ævar Arnfjörð Bjarmason
2021-11-02 12:27             ` [PATCH v6 2/8] progress.c test helper: add missing braces Ævar Arnfjörð Bjarmason
2021-11-02 12:27             ` [PATCH v6 3/8] progress.c tests: make start/stop commands on stdin Ævar Arnfjörð Bjarmason
2021-11-02 12:27             ` [PATCH v6 4/8] progress.c tests: test some invalid usage Ævar Arnfjörð Bjarmason
2021-11-02 12:27             ` [PATCH v6 5/8] progress.c: add temporary variable from progress struct Ævar Arnfjörð Bjarmason
2021-11-02 12:27             ` [PATCH v6 6/8] pack-bitmap-write.c: don't return without stop_progress() Ævar Arnfjörð Bjarmason
2021-11-02 12:27             ` [PATCH v6 7/8] various *.c: use isatty(0|2), not isatty(STDIN_FILENO|STDERR_FILENO) Ævar Arnfjörð Bjarmason
2021-11-02 12:27             ` [PATCH v6 8/8] progress.c: add & assert a "global_progress" variable Ævar Arnfjörð Bjarmason

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