import { AnyIterable } from './types';
interface ITimeConfig {
    progress?: (delta: [number, number], total: [number, number]) => any;
    total?: (time: [number, number]) => any;
}
export declare function time(config?: ITimeConfig): {
    <R>(iterable: AsyncIterable<R>): AsyncIterableIterator<R>;
    <R>(iterable: Iterable<R>): IterableIterator<R>;
};
export declare function time<T>(config: ITimeConfig | undefined, iterable: AnyIterable<T>): AsyncIterableIterator<T>;
export {};