linux-kernel - Re: [PATCH] tags: much faster, parallel "make tags"

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Message-ID: <552E31A0.3090503@suse.cz>
Date:	Wed, 15 Apr 2015 11:38:40 +0200
From:	Michal Marek <mmarek@...e.cz>
To:	Alexey Dobriyan <adobriyan@...il.com>
CC:	akpm@...ux-foundation.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] tags: much faster, parallel "make tags"

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
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