using data- attributes will affect the performance of the application?

Question

i am planning to use data- attributes to identify elements in DOM for selenium test cases. Will the usage of attributes affects application performance?

Answer 1

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.