Between By XPath and By ID which is the better for locating elements

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I'm new to Selenium, so can someone tell me, which of the two is faster and better? Is there another better locator technique that I can use? I've heard XPath is the default standard. Any reason why?
May 30, 2018 in Selenium by eLiJha
• 770 points
12,091 views

1 answer to this question.

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Technically speaking, By.ID() is the faster technique because at its root, the call goes down to document.getElementById(), which is optimized by most browsers.

But, finding elements using XPath is better for locating elements having complex selectors, and is no doubt the most flexible selection strategy. But it can be very slow, particularly in IE. Its also important to note that IE 6, 7, or 8, are slower with XPath when compared to Firefox. So, browser compatibility also makes a slight difference here and there.

So my take on this issue is, if you ever need to find an element using a complex selector, I would recommend using CSSSelectors, whenever possible. It's not quite as flexible as XPath, but will cover many of the same cases, without exhibiting extreme performance penalty on IE that XPath can.
answered May 30, 2018 by sniffy_god
• 780 points

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