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From: Michal Marek <mmarek@suse.cz>
To: Alexey Dobriyan <adobriyan@gmail.com>
Cc: akpm@linux-foundation.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] tags: much faster, parallel "make tags"
Date: Wed, 15 Apr 2015 11:38:40 +0200	[thread overview]
Message-ID: <552E31A0.3090503@suse.cz> (raw)
In-Reply-To: <20150414172047.GA5641@p183.telecom.by>

On 2015-04-14 19:20, Alexey Dobriyan wrote:
> ctags is single-threaded program. Split list of files to be tagged into
> equal parts, 1 part for each CPU and then merge the results.
> 
> Speedup on one 2-way box I have is ~143 s => ~99 s (-31%).
> On another 4-way box: ~120 s => ~65 s (-46%!).

I want this! :-)


> +	# seems like Useless Use of cat(1) but not really
> +	NR_LINES=$(cat .make-tags.src | wc -l)

wc -l <.make-tags.src

Michal

  parent reply	other threads:[~2015-04-15  9:38 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-04-14 17:20 [PATCH] tags: much faster, parallel "make tags" Alexey Dobriyan
2015-04-14 20:05 ` Randy Dunlap
2015-04-14 20:24   ` Guenter Roeck
2015-04-15  9:36     ` Michal Marek
2015-04-15  9:38 ` Michal Marek [this message]
2015-04-15  9:51   ` Alexey Dobriyan
2015-04-15 13:24 ` Michal Marek
2015-04-15 13:41   ` Michal Marek
2015-04-15 19:45   ` [PATCH v2] " Alexey Dobriyan

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