lazy loading

Date	2013-01-17 15:38 +1100
From	Andrew Poulos <ap_prog@hotmail.com>
Newsgroups	comp.lang.javascript
Subject	lazy loading
Message-ID	<dfKdnY2PqMKkHWrNnZ2dnUVZ_uadnZ2d@westnet.com.au> (permalink)

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A job I recently considered applying for required a person knowledgeable 
about lazy loading.

Googling for "lazy loading" I found this page
   <http://ajaxpatterns.org/On-Demand_Javascript>
which claims:

"...because her new website requires lots of Javascript. She refactors 
the application, extracting out a few Javascript modules. The initial 
page load is now much faster, because only a bare-bones initialisation 
module is pulled down, with the other modules loaded only when they're 
needed."

I'm at a loss as to how this gives any real benefit to users.

If the goal is to increase the user's experience by shortening the 
apparent load time what happens when the user clicks a button that 
requires some javascript to be there and the user needs to wait for the 
javascript to be downloaded? Haven't you just moved the time delay from 
the page load?

Wouldn't it be better to have a, say, 5 second page delay for page load 
and to then have the page operate smoothly rather than five 1 second 
delays during the use of the page?

Andrew Poulos

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Thread

lazy loading Andrew Poulos <ap_prog@hotmail.com> - 2013-01-17 15:38 +1100
  Re: lazy loading "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2013-01-16 23:50 -0800
  Re: lazy loading Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2013-01-17 17:00 +0100
    Re: lazy loading Andrew Poulos <ap_prog@hotmail.com> - 2013-01-18 07:24 +1100
      Re: lazy loading Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2013-01-17 22:00 +0100
        Re: lazy loading Osmo Saarikumpu <osmo@weppipakki.com> - 2013-01-21 09:49 +0200
          Re: lazy loading Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2013-01-21 11:54 +0100
  Re: lazy loading Danny <dann90038@gmail.com> - 2013-01-18 13:26 -0800
    Re: lazy loading Andrew Poulos <ap_prog@hotmail.com> - 2013-01-19 13:34 +1100
  Re: lazy loading Danny <dann90038@gmail.com> - 2013-01-19 11:12 -0800

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