Performance Optimization Techniques

What memory optimization technique is demonstrated here?

// Inefficient
const arr = [];
for (let i = 0; i < 10000; i++) {
  arr.push(i);
}

// Optimized
const arr2 = new Array(10000);
for (let i = 0; i < 10000; i++) {
  arr2[i] = i;
}

Array iteration optimization
Pre-allocation of array memory
Pre-allocating array memory improves performance by: 1) Avoiding multiple array resizing operations, 2) Allocating the required memory space upfront, 3) Eliminating the need for internal array growth calculations, 4) Reducing memory fragmentation, 5) Preventing copying of elements during resizing, 6) Particularly beneficial for large arrays, 7) More efficient memory usage pattern, 8) Reduces garbage collection pressure from temporary allocations.
Loop unrolling
Memory pooling

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