What performance concept is demonstrated by this optimization?
// Before optimization
function processData(data) {
return data.filter(x => x > 0)
.map(x => x * 2)
.reduce((a, b) => a + b, 0);
}
// After optimization
function processDataOptimized(data) {
let sum = 0;
for (let i = 0; i < data.length; i++) {
if (data[i] > 0) {
sum += data[i] * 2;
}
}
return sum;
}
Array method chaining reduction improves performance by: 1) Eliminating creation of intermediate arrays, 2) Reducing memory allocation and garbage collection, 3) Processing data in a single pass instead of multiple iterations, 4) Avoiding the overhead of creating and calling multiple array methods, 5) Reducing the total number of operations performed, 6) Particularly important for large datasets or frequent operations, 7) Maintains readable code while improving performance, 8) Common optimization pattern for data processing operations.