Re: XHR: Passing Parameters to a ready-state-change Function

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Message-ID	<1704778.3LbdHo29L0@PointedEars.de> (permalink)
From	Thomas 'PointedEars' Lahn <PointedEars@web.de>
Reply-To	Thomas 'PointedEars' Lahn <cljs@PointedEars.de>
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Subject	Re: XHR: Passing Parameters to a ready-state-change Function
Newsgroups	comp.lang.javascript
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Tim Streater wrote:

>  Thomas 'PointedEars' Lahn <PointedEars@web.de> wrote:
>> Tim Streater wrote:
>> > And each time you call your ajax function you'll get a new one.
>> Which is not a bad thing.
>> 
>> > AIUI, although my knowledge of closures is a bit limited, each one will
>> > live forever unless you explicitly dump it when you've finished with
>> > it. By setting it to null, it'll get garbage-collected subsequently.
> 
> I leave that to the browser to worry about.

IOW, you are incompetent enough to not care about your users.

>> Wishful thinking.  There is no guarantee that garbage collection will
>> commence before all browser windows are closed.
> 
> [snip]
> 
>> >           request = null;
>> 
>> With regard to memory efficiency and probably even runtime efficiency, it
>> is far better to reuse an existing XHR object once the request has been
>> processed.  See JSX:http.js [1] for example.
> 
> No doubt, but I may have several such requests outstanding at any given
> moment and have no desire to manage a set of XHR objects.

So you would rather not manage them and let them waste memory, one by one, 
eating it up until the browser application exits, in the worst case.  Where 
is the logic in that?
 

PointedEars
-- 
Prototype.js was written by people who don't know javascript for people
who don't know javascript. People who don't know javascript are not
the best source of advice on designing systems that use javascript.
  -- Richard Cornford, cljs, <f806at$ail$1$8300dec7@news.demon.co.uk>

Thread

XHR: Passing Parameters to a ready-state-change Function Gene Wirchenko <genew@ocis.net> - 2012-09-05 13:53 -0700
  Re: XHR: Passing Parameters to a ready-state-change Function Jim T. <x@y.z> - 2012-09-05 17:46 -0400
    Re: XHR: Passing Parameters to a ready-state-change Function Gene Wirchenko <genew@ocis.net> - 2012-09-05 17:30 -0700
      Re: XHR: Passing Parameters to a ready-state-change Function Jim T. <x@y.z> - 2012-09-05 20:55 -0400
  Re: XHR: Passing Parameters to a ready-state-change Function Jim T. <x@y.z> - 2012-09-05 21:43 -0400
    Re: XHR: Passing Parameters to a ready-state-change Function Jim T. <x@y.z> - 2012-09-05 21:49 -0400
  Re: XHR: Passing Parameters to a ready-state-change Function Stefan Weiss <krewecherl@gmail.com> - 2012-09-06 18:56 +0200
    Re: XHR: Passing Parameters to a ready-state-change Function Gene Wirchenko <genew@ocis.net> - 2012-09-06 10:55 -0700
    Re: XHR: Passing Parameters to a ready-state-change Function Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2012-09-06 21:38 +0200
      Re: XHR: Passing Parameters to a ready-state-change Function Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2012-09-06 21:49 +0200
    Re: XHR: Passing Parameters to a ready-state-change Function Gene Wirchenko <genew@ocis.net> - 2012-09-06 15:49 -0700
      Re: XHR: Passing Parameters to a ready-state-change Function Tim Streater <timstreater@greenbee.net> - 2012-09-07 09:15 +0100
        Re: XHR: Passing Parameters to a ready-state-change Function Gene Wirchenko <genew@ocis.net> - 2012-09-07 09:58 -0700
          Re: XHR: Passing Parameters to a ready-state-change Function Tim Streater <timstreater@greenbee.net> - 2012-09-07 19:14 +0100
            Re: XHR: Passing Parameters to a ready-state-change Function cezary.tomczyk@gmail.com - 2012-09-07 13:51 -0700
              Re: XHR: Passing Parameters to a ready-state-change Function Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2012-09-08 00:52 +0200
                Re: XHR: Passing Parameters to a ready-state-change Function cezary.tomczyk@gmail.com - 2012-09-07 16:32 -0700
                Re: XHR: Passing Parameters to a ready-state-change Function Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2012-09-08 09:48 +0200
                Re: XHR: Passing Parameters to a ready-state-change Function Cezary Tomczyk <cezary.tomczyk@gmail.com> - 2012-09-08 02:09 -0700
                Re: XHR: Passing Parameters to a ready-state-change Function Tim Streater <timstreater@greenbee.net> - 2012-09-08 11:09 +0100
                Re: XHR: Passing Parameters to a ready-state-change Function Cezary Tomczyk <cezary.tomczyk@gmail.com> - 2012-09-08 03:39 -0700
                Re: XHR: Passing Parameters to a ready-state-change Function John G Harris <john@nospam.demon.co.uk> - 2012-09-08 15:00 +0100
            Re: XHR: Passing Parameters to a ready-state-change Function Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2012-09-07 23:44 +0200
              Re: XHR: Passing Parameters to a ready-state-change Function Tim Streater <timstreater@greenbee.net> - 2012-09-07 23:08 +0100
                Re: XHR: Passing Parameters to a ready-state-change Function Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2012-09-08 00:46 +0200
                Re: XHR: Passing Parameters to a ready-state-change Function Tim Streater <timstreater@greenbee.net> - 2012-09-08 11:11 +0100
                Re: XHR: Passing Parameters to a ready-state-change Function Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2012-09-08 14:21 +0200
                Re: XHR: Passing Parameters to a ready-state-change Function Tim Streater <timstreater@greenbee.net> - 2012-09-08 17:06 +0100
                Re: XHR: Passing Parameters to a ready-state-change Function Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2012-09-08 20:41 +0200
                Re: XHR: Passing Parameters to a ready-state-change Function Dr J R Stockton <reply1236@merlyn.demon.co.uk.invalid> - 2012-09-09 20:04 +0100
            Re: XHR: Passing Parameters to a ready-state-change Function Gene Wirchenko <genew@ocis.net> - 2012-09-09 18:40 -0700
              Re: XHR: Passing Parameters to a ready-state-change Function "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2012-09-10 07:21 +0000
              Re: XHR: Passing Parameters to a ready-state-change Function Tim Streater <timstreater@greenbee.net> - 2012-09-10 09:03 +0100
                Re: XHR: Passing Parameters to a ready-state-change Function "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2012-09-10 13:59 +0000
                Re: XHR: Passing Parameters to a ready-state-change Function Tim Streater <timstreater@greenbee.net> - 2012-09-10 15:35 +0100
                Re: XHR: Passing Parameters to a ready-state-change Function "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2012-09-10 22:42 +0000
                Re: XHR: Passing Parameters to a ready-state-change Function Scott Sauyet <scott.sauyet@gmail.com> - 2012-09-11 10:09 -0700
                Re: XHR: Passing Parameters to a ready-state-change Function Tim Streater <timstreater@greenbee.net> - 2012-09-11 22:42 +0100

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