transducer-performance.ts

const source = Array(1000000).fill(1).map((_, i) => Math.random());

console.time('array chaining');
const arrayResult = source
  .map(n => n * 2)
  .filter(n => n > 0.5)
  .reduce((m, c) => Math.max(m, c));
console.timeEnd('array chaining'); // 310.901ms

console.time('rxjs transducer');
const transducerResult = transducer(source)(
  map(n => n * 2),
  filter(n => n > 0.5),
  max()
);
console.timeEnd('rxjs transducer'); // 47.573ms

console.log(arrayResult === transducerResult[0]); // true