Snippet

Optimizing Heavy Operations with Readonly Array Buffers

Using `readonly number[]` types alongside `Object.freeze()` prevents accidental mutations during array traversals, enabling compiler optimizations and safeguarding shared memory structures in performance-critical code.

snippet.ts

typescript

function computeTotals(numbers: readonly number[]): number {
  let sum = 0;
  for (let i = 0; i < numbers.length; i++) {
    sum += numbers[i];
  }
  return sum;
}
 
const dataSet: readonly number[] = Object.freeze([10, 20, 30, 40]);
const total = computeTotals(dataSet);
console.log("Total:", total);

Breakdown

function computeTotals(numbers: readonly number[]): number

Ensures the parameter input array cannot be mutated inside the function scope.

const dataSet: readonly number[] = Object.freeze([10, 20, 30, 40]);

Freezes the array at runtime and matches the readonly type signature at compile time.

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Optimizing Heavy Operations with Readonly Array Buffers

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