import type { Profile } from '../interfaces/profile.interface.js';
export interface GcCounter {
    count: number;
    duration: number;
}
export declare function registerGcCounter(read: (() => GcCounter) | undefined): void;
export declare function markProfileStart(profile: Profile, at?: number): void;
export declare function profileElapsedMs(profile: Profile): number;
export declare function completeProfilePerformance(profile: Profile): void;