From: Taylor Blau <ttaylorr@github.com>
To: Elijah Newren <newren@gmail.com>
Cc: git@vger.kernel.org, Derrick Stolee <dstolee@microsoft.com>,
Jeff King <peff@peff.net>, Jonathan Nieder <jrnieder@gmail.com>,
Jonathan Tan <jonathantanmy@google.com>,
Taylor Blau <me@ttaylorr.com>
Subject: Re: [PATCH 1/1] merge-ort: begin performance work; instrument with trace2_region_* calls
Date: Fri, 8 Jan 2021 15:59:36 -0500 [thread overview]
Message-ID: <X/jHpZlSxwAxoUyq@nand.local> (raw)
In-Reply-To: <20210108205111.2197944-2-newren@gmail.com>
On Fri, Jan 08, 2021 at 12:51:11PM -0800, Elijah Newren wrote:
> Overall timings, using hyperfine (1 warmup run, 3 runs for mega-renames,
> 10 runs for the other two cases):
Ah, I love hyperfine. In case you don't already have this in your
arsenal, the following `--prepare` step is useful for measuring
cold-cache performance:
--prepare='sync; echo 3 | sudo tee /proc/sys/vm/drop_caches'
> === Goals ===
>
> This patch is obviously just the beginning. Here are some of my goals
> that this measurement will help us achieve:
>
> * Drive the cost of rename detection down considerably for merges
> * After the above has been achieved, see if there are other slowness
> factors (which would have previously been overshadowed by rename
> detection costs) which we can then focus on and also optimize.
> * Ensure our rebase testcase that requires little rename detection
> is noticeably faster with merge-ort than with apply-based rebase.
These are great, and I am looking forward to your work.
> Signed-off-by: Elijah Newren <newren@gmail.com>
Thanks, this patch looks good to me.
Thanks,
Taylor
next prev parent reply other threads:[~2021-01-08 21:04 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-08 20:51 [PATCH 0/1] And so it begins...merge/rename performance work Elijah Newren
2021-01-08 20:51 ` [PATCH 1/1] merge-ort: begin performance work; instrument with trace2_region_* calls Elijah Newren
2021-01-08 20:59 ` Taylor Blau [this message]
2021-01-08 21:50 ` Elijah Newren
2021-01-08 21:55 ` Taylor Blau
2021-01-09 0:52 ` Elijah Newren
2021-01-13 22:11 ` [PATCH v2 0/1] And so it begins...merge/rename performance work Elijah Newren
2021-01-13 22:11 ` [PATCH v2 1/1] merge-ort: begin performance work; instrument with trace2_region_* calls Elijah Newren
2021-01-14 19:08 ` [PATCH v2 0/1] And so it begins...merge/rename performance work Junio C Hamano
2021-01-14 20:18 ` Elijah Newren
2021-01-15 19:29 ` [PATCH v3 " Elijah Newren
2021-01-15 19:29 ` [PATCH v3 1/1] merge-ort: begin performance work; instrument with trace2_region_* calls Elijah Newren
2021-01-24 6:01 ` [PATCH v4 0/3] And so it begins...merge/rename performance work Elijah Newren
2021-01-24 6:01 ` [PATCH v4 1/3] merge-ort: fix massive leak Elijah Newren
2021-01-24 19:11 ` Derrick Stolee
2021-01-24 6:01 ` [PATCH v4 2/3] merge-ort: ignore the directory rename split conflict for now Elijah Newren
2021-01-24 6:01 ` [PATCH v4 3/3] merge-ort: begin performance work; instrument with trace2_region_* calls Elijah Newren
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