import type { IScheduler, ITask, ITime } from '../types.js';
/**
 * Node.js optimized scheduler implementation.
 *
 * Uses setImmediate for asap tasks. setImmediate fires in Node's "check"
 * phase, AFTER the "timers" phase — so a setTimeout(0) callback can fire
 * before a pending setImmediate. To preserve "asap before delay" ordering,
 * the timer callback first cancels and flushes any pending setImmediate.
 *
 * Implementation notes (metal):
 *  - asapTasks array is recycled across flushes to avoid per-flush
 *    allocation under high-frequency scheduling.
 *  - All tasks within a single flush share one logical timestamp so that
 *    "events scheduled in the same tick" agree on time().
 */
export declare class NodeScheduler implements IScheduler {
    private asapTasks;
    private asapImmediate;
    private recycled;
    private readonly initialTime;
    private readonly initialWallClockTime;
    asap(task: ITask): Disposable;
    delay(task: ITask, delay: ITime): Disposable;
    flushAsapTasks: () => void;
    runDelayedTask: (task: ITask) => void;
    time(): ITime;
    dayTime(): ITime;
}
export declare function createNodeScheduler(): IScheduler;