Sign Up to our social questions and Answers Engine to ask questions, answer people’s questions, and connect with other people.
Login to our social questions & Answers Engine to ask questions answer people’s questions & connect with other people.
Lost your password? Please enter your email address. You will receive a link and will create a new password via email.
Please briefly explain why you feel this question should be reported.
Please briefly explain why you feel this answer should be reported.
Please briefly explain why you feel this user should be reported.
Do common JavaScript engines, such as V8 and WebKit’s JavaScriptCore, use string interning for JavaScript strings? Or do they actually keep multiple instances of identical strings in memory?
Yes. In general any literal string, identifier, or other constant string in JS source is interned. However implementation details (exactly what is interned for instance) varies, as well as when the interning occurs.
Note that a string value is not the same as a String Object though, String Objects are not interned because that would be fundamentally incorrect behaviour.