static <A> L<A> parallelEval(ThreadPoolExecutor executor default null, L<IF0<A>> l) {
  ret parallelMap2(executor, l, func(IF0<A> f) -> A { callF(f) });
}

static <A> L<A> parallelEval(ThreadPoolExecutor executor default null, IF0<A>... l) {
  ret parallelEval(executor, asVirtualList(l));
}