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This article is to share with you about the reading speed of js objects. The editor thinks it is very practical, so share it with you as a reference and follow the editor to have a look.

1. Accessing literals and local variables is the fastest, while accessing array elements and object members is relatively slow. When you access object members, you search on the prototype chain just like the scope chain.

2. If the member found is too deep in the prototype chain, the access speed will slow down.

Therefore, it is necessary to minimize the number of searches and nesting depth of object members.

Example

/ / search function hasEitherClass (element, className1, className2) {return element.className = className1 | | element.className = className2;} / / optimize twice. If this variable does not change, you can use local variables to save the found content function hasEitherClass (element, className1, className2) {const currentClassName = element.className; return currentClassName = className1 | | currentClassName = className2;} Thank you for reading! This is the end of the article on "how fast the js object is?". I hope the above content can be of some help to you, so that you can learn more knowledge. if you think the article is good, you can share it for more people to see!

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