Re: Serious performance impact with iterator

[Jason Lea]

If you are using tomcat you could look at the trimSpaces option for JSP 
page compilation in server.xml
There are also filters that can be used to compress the page as it is 
being sent to the browser.

You can also try writing out tags differently to minimise spaces 
produced in source eg

<logic:iterate ...
        ><tr ... ><logic:iterate ...
                ><logic:equal name="colCount" value="0"
                        ><td  ... ><!-- last name --><a ...>&nbsp;<bean:write ... 
/></a></td></logic:equal
... ... ...</logic:iterate
</tr></logic:iterate>

The spaces inside a tag will not be output to the page.  So by putting 
the indentations there, you can see them in the code but not the html 
that is sent to the browser.

Eg
<logic:iterate ...
   >abc</logic:iterate>
will produce
'abcabcabcabc'
where as
<logic:iterate ...>
   abc
</logic:iterate>
will produce
'    abc
   abc
   abc
   abc'


JoAnn Lemm wrote:
Hey All,
I'm wondering if anyone else is seeing this impact.
I've got an iterator within an iterator thusly:
<table border='1' cellpadding='0' cellspacing='0'
style='BORDER-COLLAPSE: collapse' bordercolor='#111111'>
 <logic:iterate id="rowArray" name="batchForm"
property="rowBatchDetails" indexId="rowCount">
   <tr align="center"
bgcolor='<%=rowCount.intValue()%2==0?"#ffffff":"#dddddd"%>'>
      <logic:iterate id="colArray" name="rowArray" indexId="colCount">
             <logic:equal name="colCount" value="0">
                <td  align='left' width='165' class='normaltxt'
height="20"> <!-- last name -->
                   <a
HREF="batch.do?action=Prospect&prospectChoice=<%=rowCount%>"
target="_top">
                        &nbsp;<bean:write name="colArray" /></a>
                 </td>
                </logic:equal>
<etc ...>
       </logic:iterate>
     </tr>
  </logic:iterate>
</table>


The resulting html looks like the following. Note all the empty spaces.
Needless to say, this has impacted performance on the website
significantly by increasing the size of the page to something ludicrous
when I have more than 20 rows with 10 columns of data to display!
Anyone have a solution for this?  A patch somewhere? Do I resort to
using *gasp* scriptlets?
<table border='1' cellpadding='0' cellspacing='0'
style='BORDER-COLLAPSE: collapse' bordercolor='#111111'>  <tr
align="center" bgcolor='#ffffff'>
                               

                                  
         <td  align='left' width='165' class='normaltxt' height="20">
<!-- last name -->
            <a HREF="batch.do?action=Prospect&prospectChoice=0"
target="_top">
                &nbsp;Aiken</a>
         </td>

                                  

                                  

                                  

                                  

                                  

                                  

                                  

                                  

                                  

                                  

                                  

                                  

                                  

                                  

                                  
                                

                                  

                                  
      <td align='left' width='150' class='normaltxt' height="20"> <!--
first name-->
           <a HREF="batch.do?action=Prospect&prospectChoice=0"
target="_top">
                &nbsp;Glenda</a>
      </td>

<and more of the same ...>
JoAnn Lemm
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--
Jason Lea

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