Performance Optimization Techniques

Hidden class optimization provides significant performance benefits: 1) V8 and other modern engines create hidden classes for objects with the same structure, 2) Consistent object shapes allow engines to optimize property access paths, 3) Properties can be accessed using fixed offsets instead of dictionary lookups, 4) This optimization can make property access up to 10x faster, 5) Objects should be initialized with their complete structure to benefit from this, 6) Adding properties after creation can deoptimize the object by changing its hidden class, 7) Best practice is to declare all properties in the constructor, 8) This optimization is crucial for high-performance JavaScript applications.