From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <zsh-workers-return-42440-mason-zsh=primenet.com.au@zsh.org>
Received: (qmail 16654 invoked by alias); 10 Mar 2018 08:37:00 -0000
Mailing-List: contact zsh-workers-help@zsh.org; run by ezmlm
Precedence: bulk
X-No-Archive: yes
List-Id: Zsh Workers List <zsh-workers.zsh.org>
List-Post: <mailto:zsh-workers@zsh.org>
List-Help: <mailto:zsh-workers-help@zsh.org>
List-Unsubscribe: <mailto:zsh-workers-unsubscribe@zsh.org>
X-Seq: 42440
Received: (qmail 14189 invoked by uid 1010); 10 Mar 2018 08:37:00 -0000
X-Qmail-Scanner-Diagnostics: from aok120.rev.netart.pl by f.primenet.com.au (envelope-from <psprint@zdharma.org>, uid 7791) with qmail-scanner-2.11 
 (clamdscan: 0.99.2/21882. spamassassin: 3.4.1.  
 Clear:RC:0(85.128.245.120):SA:0(-1.9/5.0):. 
 Processed in 13.532159 secs); 10 Mar 2018 08:37:00 -0000
X-Spam-Checker-Version: SpamAssassin 3.4.1 (2015-04-28) on f.primenet.com.au
X-Spam-Level: 
X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham
	autolearn_force=no version=3.4.1
X-Envelope-From: psprint@zdharma.org
X-Qmail-Scanner-Mime-Attachments: |
X-Qmail-Scanner-Zip-Files: |
X-Virus-Scanned: by amavisd-new using ClamAV (9)
Date: Sat, 10 Mar 2018 09:36:42 +0100
From: Sebastian Gniazdowski <psprint@zdharma.org>
To: Stephane Chazelas <stephane.chazelas@gmail.com>
Cc: Zsh hackers list <zsh-workers@zsh.org>
Message-ID: <etPan.5aa3991a.596633ab.159ee@zdharma.org>
In-Reply-To: <20180309145352.GB20986@chaz.gmail.com>
References: <etPan.5aa22836.70671812.159ee@zdharma.org>
 <etPan.5aa28b1e.77e79f33.159ee@AirmailxGenerated.am>
 <etPan.5aa28e7e.6288ff7f.159ee@zdharma.org>
 <20180309145352.GB20986@chaz.gmail.com>
Subject: Re: Performance tests of quoting and dequoting, printf -v
 turned out slow
X-Mailer: Airmail (467)
MIME-Version: 1.0
Content-Type: text/plain; charset="utf-8"
Content-Transfer-Encoding: 7bit
Content-Disposition: inline

On 9 marca 2018 at 15:53:52, Stephane Chazelas (stephane.chazelas@gmail.com) wrote:
> 2018-03-09 14:39:10 +0100, Sebastian Gniazdowski:
> [...]
> > 5.3.1, I looked also at 5.4.2 and the results were the same.
> > For your snippets I get the same results as you. If I source
> > short.zsh, I again get ~25 sec time. I will find some time to
> > narrow this shortly.
> [...]
> 
> Maybe a heavy (that forks for instance) "DEBUG" trap?
> 
> or a wrapper function around "printf"?

I only changed method of time measurement in your snippet, and obtained the slowness:

% typeset -F3 SECONDS=0; INPUT='ice as"program" pick"$ZPFX/bin/prll_(qer|bfr)" src"prll.sh" make"install PREFIX=$ZPFX"'; for ((i = 0; i < 50000; i++)); do printf -v OUTPUT '%q' "$INPUT"; done; echo $SECONDS
151.137

Not sure what using `time' instead of $SECONDS does, but above method is less suspected of any side effects.

-- 
Sebastian Gniazdowski
psprint /at/ zdharma.org