roan-wise

public class Main {
    public static void main(String[] args) {
        long start = System.currentTimeMillis();
        List<Integer> data = List.of(1, 2, 3);

        var processed = data.stream()
            .map(task -> {
                System.out.printf("Submitting %d at %d ms\n", task, System.currentTimeMillis() - start);
                return CompletableFuture.supplyAsync(() -> processData(task, start));
            })