Therefore they should be doing the same amount of work, even if we include the minute differences in their corresponding engineer implementation. Although it is quantitatively valid that the coercion process takes a considerable amount of processing time, however the additional time is in microseconds.Īlternatively, while considering the comparison of two different values of the same type, the “=” operator and the “=” operators both use the same algorithm. But consider the second explanation where “=” is getting more work done, as it follows through the steps of coercion in case of different types.īeware of this trap! Many people think that this has a link with performance since “=” works relatively slower. This seems obvious since it involves checking the type. Observe that in the first explanation, it simply indicates that the operator “=” is working more than the operator “=”. Let’s take a moment and consider the two definitions, first the incorrect one and then the more appropriate one. The more appropriate definition would be: “ double equal sign allows coercion in the equality comparison while the triple equal sign operation avoids coercion.” Performance Comparisons of the Two Equalities There are multiple popular JavaScript books as well as blogs that have indicated exactly this distinction, but unfortunately they’re all wrong. Although it sounds and seems quite reasonable and distinct, it is fundamentally incorrect. However, the “loose” and the “strict” equals have a significant difference in their behaviors, especially in the way they conclude “equality”.Ī common misconception about the two operators turns out to be: “ double equal sign checks the values for equality while triple equal sign checks both values and their types for equality”. Usually both these operators are utilized in the comparison of two values and check for “equality”. Loose equals refers to the “=” (double equal sign) operator, while Strict equals indicates the “=” (triple equal sign) operator.
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