11/15/2023 0 Comments Stack vs heap javascript`obj1` and `obj2` do not have the same hidden class because their properties are not declared in the same order. We will eventually get the following hidden classes and their transitions. C0 is updated with a "class transition" which states that if a property "b" is added to an empty object, the hidden class should switch from C0 to C4. (6) V8 creates a hidden class C4 based on C0. C4 describes the location in the memory where the property 'b' can be found. (5) V8 can use the hidden class C0 to define 'obj2' as en empty object. Now we have 4 hidden classes, linked as such: C1 is updated with a "class transition" which states that if a property "b" is added to an object whose hidden class is C1, then the hidden class should be switched to C2. (3) V8 creates a hidden class C2 based on C1 the same way as before. C0 is updated with a "class transition" which states that if a property "a" is added to an empty object, the hidden class should switch from C0 to C1. C1 describes the location in memory where the property 'a' can be found. (2) V8 creates a hidden class C1 based on C0. Opera 11.61: elements contains ~ 1,000,000 numbersĪnd the winner is: Internet Explorer 8 for a change! It can use up all system memory, before this function call fails.Ī side note: Firefox and Opera actually throw a different (more useful) error message: Function.prototype.(1) V8 creates a hidden class C0 for 'obj1' defining an empty object. We will later see what information this hidden class holds.Firefox 12: elements contains ~ 500,000 numbers.
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