Hi, I am creating an app that would help students and researchers of marketing. The app, would be in a form of a survey/questionnaire, which would take the response from different individuals and try to find a pattern out of it. For example age group 10-15 likes candies or something like that. Since this would require input of a HUGE amount of data, I am worried about the data structure to use and also about the response time and time to find the pattern. Should I use an XML kind of a DOM structure, 
   <responses>  
     <response1>
        <ques1/>
        <ques2/>
         .
        <quesn/>
     </response1>
      .
      .
      .
     <responsen>
        <ques1/>
        <ques2/>
         .
        <quesn/>
     </responsen>
  </responses>

[download]
and then try to find patters between responses/respondents? or should i use a database with 
  select count(*) from tbl where ques1 = ans1...some complex query...

[download]

Summarising
1. Efficient Data Structure with fast lookup.
2. Reducing Searching time within sub categories.

Hope the perl monks would bestow their wisdom on me mere mortal :)
sandeep

In reply to Research App Optimization by sskohli

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