30 дек. 2009 г. · I highly doubt that instanceof would be cause any performance issues. If you need to use it, I would say go for it, and then reconsider only if you're running ... Performance: typeof vs instanceof - javascript - Stack Overflow How exactly does Javascript instanceof work? Is it slow style? Другие результаты с сайта stackoverflow.com

A JavaScript microbenchmark that tests the performance of three different approaches to check if an object is an instance of a specific type or has a certain ...

The benchmark is designed to measure the performance of different approaches in JavaScript for comparing types or properties of an object. The test compares ...

16 мар. 2021 г. · 'instanceof' allows to check type of object at run time which may be necessary in few cases. So, is it an expensive operation in JavaScript?

26 сент. 2014 г. · I know this probably won't give any performance boost, but is there a reason for not using it? The better question is, where do you want to use ...

16 янв. 2017 г. · I notice that instanceof is used extensively for the pattern matching mechanism, and was curious if this is the most performant way to do ...

On this microbenchmark which simply runs "subObj instanceof Obj" in a loop (where Obj is in the protype chain of subObj), Spidermonkey is much slower than ...

16 нояб. 2016 г. · Version: v7 and master Platform: Mac Subsystem: instanceof checks has become almost 100 times slower in Node v7+ (and current master) var r ...

4 янв. 2010 г. · I have heard that instanceof operator in java is a performance issue,. Is it true for Javascript too (IE6,IE7,IE8,FF,Chrome,safari,etc.)?

1 июн. 2024 г. · instanceof is a binary operator used in JavaScript to check whether an object is an instance of a particular class or constructor function.