i am planning to use data- attributes to identify elements in DOM for selenium test cases. Will the usage of attributes affects application performance?
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compared to not using them and using only css which may change drastically in the future. I want to know whether application slows down if i use lots data-attributes – Amareswar May 21 '12 at 19:01
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@Amareswar: What do `data-` attributes have to do with CSS? – gen_Eric May 21 '12 at 20:28
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@Rocket, i am planning to use data- attributes instead of using css classes while finding an element – Amareswar May 22 '12 at 19:53
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1@Amareswar: Classes would definitely be faster if you're selecting elements. – gen_Eric May 22 '12 at 19:56
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1A more formal answer http://stackoverflow.com/a/15010727/1559840 – Amir Nissim Jul 25 '13 at 13:59
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Not at all, you'll be fine with using data-* attributes. However, you should note that using the syntax $.data(theInput, 'someData'); is much faster than using the syntax theInput.data('someData');, as demonstrated in this jsPerf.
Elliot Bonneville
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1The link you posted only compares the various was to get data attributes. However, according to http://jsperf.com/class-vs-data-attribute-selector-performance it seems that get dom elements using data attributes instead of css selectors is about 98% slower! – Angel S. Moreno Sep 30 '14 at 20:45