Comparison of == vs === equality operator and its consequences on performance. Understanding the difference and the performance cost.

Iskandar Zulqarnain Hilmi

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Comparison between == and === in JavaScript. Coercion in JavaScript. Performance difference between == and ===.

How can == be up to 15 times slower than ===?

<p>I only use == to check if a value is undefined or null (something == null or something == undefined do the same thing)</p>
