Databases
StackOverflow2013
Postsdbo
POoptimize dom-heavy JS sorting
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POoptimize dom-heavy JS sorting
    primarykey
    data
    text
    <p>So I've built this mail-program-like HTML viewer (no real emails, just some messages from user to user). It basically behaves just like windows explorer, where you have the labels at the top and the files you can sort by date or alphabetically. Each message looks like this:</p> <pre><code>&lt;div class="mail_msg" d_id="363"&gt; &lt;div class="done"&gt;&lt;img src="../"&gt;&lt;/div&gt; &lt;div class="absender"&gt;demo&lt;/div&gt; &lt;div class="subject"&gt;subject&lt;/div&gt; &lt;div class="name"&gt;name&lt;/div&gt; &lt;div class="date"&gt;16.09.2010&lt;/div&gt; &lt;/div&gt; </code></pre> <p>Atop of all these messages there is a bar to sort them alphabetically or by date. (using prototypejs)</p> <pre><code>$$('.absender_label','.subject_label', '.bname_label').each(function(el){ el.observe('click', function(){ /* ... */ var tar = el.className.split('_')[0]; var els = $('widget_mail_'+target).select('.mail_msg'), sortedEls = els.sort(function(x, y) { var a = x.down('.'+tar).innerHTML.toLowerCase(), b = y.down('.'+tar).innerHTML.toLowerCase(); return a &lt; b ? -1 : a &gt; b ? 1 : 0; }); $('widget_mail_'+target).select('.mail_msg').invoke('remove'); sortedEls.each(function(x){ if(dir=='bottom') { $('widget_mail_'+target).insert({bottom:x}); } else if(dir=='top') { $('widget_mail_'+target).down('.mail_msg_label').insert({after:x}); } }); }); }); </code></pre> <p>I know that there is way too much DOM-manipulation going on. I select all related divs, sort them, throw away all the old unsorted messages and insert the sorted ones at the top or at the bottom (first click from A-Z, second click from Z-A).</p> <p>It still works with hundreds of messages, but it takes 2 or 3 seconds. I receive the messages as JSON and parse HTML from that, so using a table sorting script like <a href="http://yoast.com/articles/sortable-table/" rel="nofollow noreferrer">this</a> is not an option at this point.</p> <p>How can I optimize this sorting?</p>
    singulars
    1. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. USRob W
    1. USkoko
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    2. PO
      singulars
      1. PTAnswer
    3. PO
      singulars
      1. PTAnswer
    1. VO
      singulars
      1. POoptimize dom-heavy JS sorting
      1. This table or related slice is empty.
      1. VTUpMod
    1. COCannot really say without knowing where the performance bottlenecks are. Is this "2 or 3" seconds spent mostly reviving data from the server, processing that data, rendering HTML? Have you tried using profilers in Firebug/Chrome/Safari?
      singulars
      1. POoptimize dom-heavy JS sorting
      1. USMooGoo
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload