Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > comp.lang.python > #86380

Re: Are threads bad? - was: Future of Pypy?

Path csiph.com!usenet.pasdenom.info!weretis.net!feeder1.news.weretis.net!feeder.erje.net!eu.feeder.erje.net!newsfeed.xs4all.nl!newsfeed1a.news.xs4all.nl!xs4all!newsgate.cistron.nl!newsgate.news.xs4all.nl!post.news.xs4all.nl!not-for-mail
Return-Path <ian.g.kelly@gmail.com>
X-Original-To python-list@python.org
Delivered-To python-list@mail.python.org
X-Spam-Status OK 0.016
X-Spam-Evidence '*H*': 0.97; '*S*': 0.00; 'level,': 0.07; 'plenty': 0.07; 'slow.': 0.09; 'worse': 0.09; 'wrote': 0.14; '24,': 0.16; 'concurrency': 0.16; 'incorrect': 0.16; 'once.': 0.16; 'program?': 0.16; 'subject:? - ': 0.16; 'subject:Pypy': 0.16; 'subject:threads': 0.16; 'throughput': 0.16; 'wrote:': 0.18; 'wed,': 0.18; 'all,': 0.19; 'feb': 0.22; '>>>': 0.22; 'programming': 0.22; 'java': 0.24; 'least': 0.26; 'header:In- Reply-To:1': 0.27; 'chris': 0.29; 'message-id:@mail.gmail.com': 0.30; 'code': 0.31; '25,': 0.31; 'checked': 0.32; 'running': 0.33; 'problem.': 0.35; 'but': 0.35; 'received:google.com': 0.35; 'there': 0.35; 'really': 0.36; 'subject:?': 0.36; 'too': 0.37; 'two': 0.37; 'performance': 0.37; 'being': 0.38; 'ends': 0.38; 'stopped': 0.38; 'handle': 0.38; 'to:addr:python-list': 0.38; 'pm,': 0.38; "couldn't": 0.39; 'to:addr:python.org': 0.39; 'guy': 0.60; 'name': 0.63; 'life': 0.66; 'close': 0.67; 'caused': 0.69; 'intelligent': 0.74; '2015': 0.84; 'lighter': 0.84; 'subject:Are': 0.93
DKIM-Signature v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:from:date:message-id:subject:to :content-type; bh=8ylWH63iObWv5HwMbWdmkteAk5mQ63wr1wMcL985LkM=; b=pDkJNZCpYH+qILeVp+VulJHRRzCHEWIho3+ihi+n9yqu86yKI2sTAXlUJ5IESwllQr vX72H19p/3iPFyyNIFdcJseyMM+A6vPtsppQvEhHF48GTfs2dD1nRPS3lAjTBf/BUvyf Y+2PvF/iijtt2qHtTrFWhOvO88Tk1KkDhM5tdERe5JzAjA9BTpIdXRemxu0MzEsnrxIT XY5k26dzWLUqGQAh2XSyrHr9Hv1hxZSfRuTiQp/f7y5lPVtNXLePKhmhQtrFrMe3LOXQ Oe5upfIcI/ssZhr7RRLXOaG2x9LjvXVVloeCChADEWjCL4xajAjLx6FACzL1YJ3CPJr+ F1Jg==
X-Received by 10.70.30.3 with SMTP id o3mr2753978pdh.114.1424844173036; Tue, 24 Feb 2015 22:02:53 -0800 (PST)
MIME-Version 1.0
In-Reply-To <CAPTjJmoa6Rc8EZ4SxsamNPeCYzcY47AzNzVWxBvXydfp=gn-aA@mail.gmail.com>
References <jbijea5ph9m7sd9gqvp64ci1j708u5vkuq@4ax.com> <mailman.19009.1424611670.18130.python-list@python.org> <pqrjeahei7v04lu0nqgsm01jrebj10hj8e@4ax.com> <mailman.19018.1424625741.18130.python-list@python.org> <87fv9xdb22.fsf@jester.gateway.pace.com> <54ea7ff4$0$12983$c3e8da3$5496439d@news.astraweb.com> <87zj85bcyu.fsf@jester.gateway.pace.com> <mailman.19048.1424661403.18130.python-list@python.org> <87lhjpb89i.fsf@jester.gateway.pace.com> <mailman.19052.1424664024.18130.python-list@python.org> <87h9udb1eq.fsf@jester.gateway.pace.com> <mailman.19058.1424676730.18130.python-list@python.org> <87bnkkb22u.fsf@jester.gateway.pace.com> <mailman.19111.1424738135.18130.python-list@python.org> <87lhjnang1.fsf@jester.gateway.pace.com> <mailman.19118.1424757423.18130.python-list@python.org> <87bnkjenpp.fsf@elektro.pacujo.net> <8761aqamss.fsf@jester.gateway.pace.com> <87zj82bm15.fsf@elektro.pacujo.net> <mailman.19167.1424842476.18130.python-list@python.org> <87pp8ybl14.fsf@elektro.pacujo.net> <CAPTjJmoa6Rc8EZ4SxsamNPeCYzcY47AzNzVWxBvXydfp=gn-aA@mail.gmail.com>
From Ian Kelly <ian.g.kelly@gmail.com>
Date Tue, 24 Feb 2015 23:02:12 -0700
Subject Re: Are threads bad? - was: Future of Pypy?
To Python <python-list@python.org>
Content-Type text/plain; charset=UTF-8
X-BeenThere python-list@python.org
X-Mailman-Version 2.1.15
Precedence list
List-Id General discussion list for the Python programming language <python-list.python.org>
List-Unsubscribe <https://mail.python.org/mailman/options/python-list>, <mailto:python-list-request@python.org?subject=unsubscribe>
List-Archive <http://mail.python.org/pipermail/python-list/>
List-Post <mailto:python-list@python.org>
List-Help <mailto:python-list-request@python.org?subject=help>
List-Subscribe <https://mail.python.org/mailman/listinfo/python-list>, <mailto:python-list-request@python.org?subject=subscribe>
Newsgroups comp.lang.python
Message-ID <mailman.19170.1424844176.18130.python-list@python.org> (permalink)
Lines 22
NNTP-Posting-Host 2001:888:2000:d::a6
X-Trace 1424844176 news.xs4all.nl 2888 [2001:888:2000:d::a6]:51459
X-Complaints-To abuse@xs4all.nl
Xref csiph.com comp.lang.python:86380

Show key headers only | View raw

On Tue, Feb 24, 2015 at 10:54 PM, Chris Angelico <rosuav@gmail.com> wrote:
> On Wed, Feb 25, 2015 at 4:46 PM, Marko Rauhamaa <marko@pacujo.net> wrote:
>> Marcos Almeida Azevedo <marcos.al.azevedo@gmail.com>:
>>
>>> Synchronized methods in Java really makes programming life simpler.
>>> But I think it is standard practice to avoid this if there is a
>>> lighter alternative as synchronized methods are slow. Worse case I
>>> used double checked locking.
>>
>> I have yet to see code whose performance suffers from too much locking.
>> However, I have seen plenty of code that suffers from anomalies caused
>> by incorrect locking.
>
> Uhh, I have seen *heaps* of code whose performance suffers from too
> much locking. At the coarsest and least intelligent level, a database
> program that couldn't handle concurrency at all, so I wrote an
> application-level semaphore that stopped two people from running it at
> once. You want to use that program? Ask the other guy to close it.
> THAT is a performance problem. And there are plenty of narrower cases,
> where it ends up being a transactions-per-second throughput limiter.

Is the name of that database program "Microsoft Access" perchance?

Back to comp.lang.python | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

Thread

Future of Pypy? Dave Farrance <DaveFarrance@OMiTTHiSyahooANDTHiS.co.uk> - 2015-02-22 12:45 +0000
  Re: Future of Pypy? jkn <jkn_gg@nicorp.f9.co.uk> - 2015-02-22 04:58 -0800
    Re: Future of Pypy? Dave Farrance <DaveFarrance@OMiTTHiSyahooANDTHiS.co.uk> - 2015-02-22 15:30 +0000
      [OT] - BASIC is still not a bad choice, was Re: Future of Pypy? Michael Torrie <torriem@gmail.com> - 2015-02-23 17:24 -0700
  Re: Future of Pypy? Laura Creighton <lac@openend.se> - 2015-02-22 14:27 +0100
    Re: Future of Pypy? Dave Farrance <DaveFarrance@OMiTTHiSyahooANDTHiS.co.uk> - 2015-02-22 15:36 +0000
      Re: Future of Pypy? Laura Creighton <lac@openend.se> - 2015-02-22 18:22 +0100
        Re: Future of Pypy? Paul Rubin <no.email@nospam.invalid> - 2015-02-22 11:02 -0800
          Re: Future of Pypy? Laura Creighton <lac@openend.se> - 2015-02-22 20:51 +0100
            Re: Future of Pypy? Paul Rubin <no.email@nospam.invalid> - 2015-02-22 12:14 -0800
              Re: Future of Pypy? Laura Creighton <lac@openend.se> - 2015-02-22 23:13 +0100
                Re: Future of Pypy? Paul Rubin <no.email@nospam.invalid> - 2015-02-22 18:45 -0800
          Re: Future of Pypy? Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2015-02-23 12:18 +1100
            Re: Future of Pypy? Paul Rubin <no.email@nospam.invalid> - 2015-02-22 18:04 -0800
              Re: Future of Pypy? Chris Angelico <rosuav@gmail.com> - 2015-02-23 13:16 +1100
              Re: Future of Pypy? Ryan Stuart <ryan.stuart.85@gmail.com> - 2015-02-23 03:16 +0000
                Re: Future of Pypy? Paul Rubin <no.email@nospam.invalid> - 2015-02-22 19:45 -0800
                Re: Future of Pypy? Ryan Stuart <ryan.stuart.85@gmail.com> - 2015-02-23 04:00 +0000
                Re: Future of Pypy? Paul Rubin <no.email@nospam.invalid> - 2015-02-22 22:13 -0800
                Re: Future of Pypy? Ryan Stuart <ryan.stuart.85@gmail.com> - 2015-02-23 07:32 +0000
                Re: Future of Pypy? Paul Rubin <no.email@nospam.invalid> - 2015-02-23 16:11 -0800
                Re: Future of Pypy? Chris Angelico <rosuav@gmail.com> - 2015-02-24 11:31 +1100
                Re: Future of Pypy? Paul Rubin <no.email@nospam.invalid> - 2015-02-23 17:50 -0800
                Re: Future of Pypy? Chris Angelico <rosuav@gmail.com> - 2015-02-24 13:03 +1100
                Re: Future of Pypy? Paul Rubin <no.email@nospam.invalid> - 2015-02-23 20:40 -0800
                Re: Future of Pypy? Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2015-02-24 17:57 +1100
                Re: Future of Pypy? Paul Rubin <no.email@nospam.invalid> - 2015-02-27 13:40 -0800
                Re: Future of Pypy? Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2015-02-27 18:47 -0500
                Are threads bad? - was: Future of Pypy? Ryan Stuart <ryan.stuart.85@gmail.com> - 2015-02-24 00:35 +0000
                Re: Are threads bad? - was: Future of Pypy? Paul Rubin <no.email@nospam.invalid> - 2015-02-23 21:27 -0800
                Re: Are threads bad? - was: Future of Pypy? Chris Angelico <rosuav@gmail.com> - 2015-02-24 16:57 +1100
                Re: Are threads bad? - was: Future of Pypy? Paul Rubin <no.email@nospam.invalid> - 2015-02-23 22:23 -0800
                Re: Are threads bad? - was: Future of Pypy? Marko Rauhamaa <marko@pacujo.net> - 2015-02-24 10:08 +0200
                Re: Are threads bad? - was: Future of Pypy? Paul Rubin <no.email@nospam.invalid> - 2015-02-24 15:53 -0800
                Re: Are threads bad? - was: Future of Pypy? Marko Rauhamaa <marko@pacujo.net> - 2015-02-25 07:25 +0200
                Re: Are threads bad? - was: Future of Pypy? Marcos Almeida Azevedo <marcos.al.azevedo@gmail.com> - 2015-02-25 13:34 +0800
                Re: Are threads bad? - was: Future of Pypy? Marko Rauhamaa <marko@pacujo.net> - 2015-02-25 07:46 +0200
                Re: Are threads bad? - was: Future of Pypy? Chris Angelico <rosuav@gmail.com> - 2015-02-25 16:54 +1100
                Re: Are threads bad? - was: Future of Pypy? Marcos Almeida Azevedo <marcos.al.azevedo@gmail.com> - 2015-02-25 13:58 +0800
                Re: Are threads bad? - was: Future of Pypy? Ian Kelly <ian.g.kelly@gmail.com> - 2015-02-24 23:02 -0700
                Re: Are threads bad? - was: Future of Pypy? Chris Angelico <rosuav@gmail.com> - 2015-02-25 17:07 +1100
                Re: Are threads bad? - was: Future of Pypy? Mark Lawrence <breamoreboy@yahoo.co.uk> - 2015-02-25 16:37 +0000
                Re: Are threads bad? - was: Future of Pypy? Ian Kelly <ian.g.kelly@gmail.com> - 2015-02-25 10:00 -0700
                Re: Are threads bad? - was: Future of Pypy? Mark Lawrence <breamoreboy@yahoo.co.uk> - 2015-02-25 17:16 +0000
                Re: Are threads bad? - was: Future of Pypy? Chris Angelico <rosuav@gmail.com> - 2015-02-26 04:22 +1100
                Re: Are threads bad? - was: Future of Pypy? Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2015-02-25 19:44 -0500
                Re: Are threads bad? - was: Future of Pypy? Ryan Stuart <ryan.stuart.85@gmail.com> - 2015-02-25 00:59 +0000
                Re: Are threads bad? - was: Future of Pypy? Paul Rubin <no.email@nospam.invalid> - 2015-02-26 21:55 -0800
              Re: Future of Pypy? Chris Angelico <rosuav@gmail.com> - 2015-02-23 14:25 +1100
              Re: Future of Pypy? Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2015-02-23 18:41 +1100
                Re: Future of Pypy? Marko Rauhamaa <marko@pacujo.net> - 2015-02-23 10:16 +0200
                Re: Future of Pypy? Chris Angelico <rosuav@gmail.com> - 2015-02-23 20:19 +1100
                Re: Future of Pypy? Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2015-02-24 17:56 +1100
                Re: Future of Pypy? Chris Angelico <rosuav@gmail.com> - 2015-02-24 18:16 +1100
                Re: Future of Pypy? wxjmfauth@gmail.com - 2015-02-23 23:57 -0800
                Re: Future of Pypy? Ethan Furman <ethan@stoneleaf.us> - 2015-02-23 11:39 -0800
                Re: Future of Pypy? Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2015-02-24 13:15 +1100
                Re: Future of Pypy? Paul Rubin <no.email@nospam.invalid> - 2015-02-23 17:47 -0800
                Re: Future of Pypy? Marko Rauhamaa <marko@pacujo.net> - 2015-02-24 10:12 +0200
      Re: Future of Pypy? Emile van Sebille <emile@fenx.com> - 2015-02-24 09:57 -0800
  Re: Future of Pypy? Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2015-02-23 01:05 +1100
    Re: Future of Pypy? Dave Farrance <DaveFarrance@OMiTTHiSyahooANDTHiS.co.uk> - 2015-02-22 15:44 +0000
      Re: Future of Pypy? Dave Farrance <DaveFarrance@OMiTTHiSyahooANDTHiS.co.uk> - 2015-02-22 19:20 +0000
        Re: Future of Pypy? Laura Creighton <lac@openend.se> - 2015-02-22 22:45 +0100
          Re: Future of Pypy? Dave Farrance <DaveFarrance@OMiTTHiSyahooANDTHiS.co.uk> - 2015-02-23 14:04 +0000
            Re: Future of Pypy? Laura Creighton <lac@openend.se> - 2015-02-23 17:16 +0100
  Re: Future of Pypy? Terry Reedy <tjreedy@udel.edu> - 2015-02-23 01:34 -0500
  Re: Future of Pypy? Dave Cook <davecook@nowhere.net> - 2015-02-23 11:36 +0000
    Re: Future of Pypy? Dave Farrance <DaveFarrance@OMiTTHiSyahooANDTHiS.co.uk> - 2015-02-23 14:13 +0000
      Cython - was: Future of Pypy? Stefan Behnel <stefan_ml@behnel.de> - 2015-02-23 16:43 +0100
      Re: Future of Pypy? Dave Cook <davecook@nowhere.net> - 2015-02-23 23:23 +0000

csiph-web