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From: Derrick Stolee <stolee@gmail.com>
To: Nathaniel Filardo <nwf20@cl.cam.ac.uk>, git@vger.kernel.org
Cc: Derrick Stolee <dstolee@microsoft.com>
Subject: Re: [PATCH 3/4] repack: add --sparse and pass to pack-objects
Date: Tue, 12 Mar 2019 09:47:18 -0400
Message-ID: <f26c68df-8895-2a2d-0175-5fa3581ab45a@gmail.com> (raw)
In-Reply-To: <20190312131858.26115-4-nwf20@cl.cam.ac.uk>

On 3/12/2019 9:18 AM, Nathaniel Filardo wrote:
> The sparse connectivity algorithm saves a whole lot of time when there
> are UNINTERESTING trees around.

Interesting! Do you have some performance numbers to include with
this statement?
> @@ -48,6 +49,10 @@ static int repack_config(const char *var, const char *value, void *cb)
>  		use_delta_islands = git_config_bool(var, value);
>  		return 0;
>  	}
> +	if (!strcmp(var, "pack.usesparse")) {
> +		sparse = git_config_bool(var, value);
> +		return 0;
> +	}

This part is not handled inside of `pack-objects`. Since you are not
sending '--no-sparse' when the variable 'sparse' is zero, the config
setting will automatically be picked up by the pack-objects builtin.

Now, a question of whether you _should_ allow the '--no-sparse' option
in the 'repack' command, and send it along to the inner command (when
it is present) is another question.

> @@ -366,6 +374,8 @@ int cmd_repack(int argc, const char **argv, const char *prefix)
>  	argv_array_push(&cmd.args, "--all");
>  	argv_array_push(&cmd.args, "--reflog");
>  	argv_array_push(&cmd.args, "--indexed-objects");
> +	if (sparse)
> +		argv_array_push(&cmd.args, "--sparse");
>  	if (repository_format_partial_clone)
>  		argv_array_push(&cmd.args, "--exclude-promisor-objects");
>  	if (write_bitmaps)
> 

How about a test with this new option? You can probably just add to
t5322-pack-objects-sparse.sh.

Thanks,
-Stolee

  reply	other threads:[~2019-03-12 13:47 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-03-12 13:18 [PATCH 0/4] Speed up repacking when lots of pack-kept objects Nathaniel Filardo
2019-03-12 13:18 ` [PATCH 1/4] count-objects: report statistics about kept packs Nathaniel Filardo
2019-03-12 13:18 ` [PATCH 2/4] revision walk: optionally use sparse reachability Nathaniel Filardo
2019-03-12 13:59   ` Derrick Stolee
2019-03-12 13:18 ` [PATCH 3/4] repack: add --sparse and pass to pack-objects Nathaniel Filardo
2019-03-12 13:47   ` Derrick Stolee [this message]
2019-03-12 14:03     ` Dr N.W. Filardo
2019-03-12 13:18 ` [PATCH 4/4] repack: optionally assume transitive kept packs Nathaniel Filardo

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