export interface HttpPhases {
    wait?: number;
    dns?: number;
    tcp?: number;
    tls?: number;
    connect?: number;
    request?: number;
    firstByte?: number;
    download?: number;
}
export type HttpPhaseName = keyof HttpPhases;
export declare const HTTP_PHASE_SEQUENCE: readonly HttpPhaseName[];
export declare const HTTP_PHASE_LABELS: Readonly<Record<HttpPhaseName, string>>;
export declare const HTTP_PHASE_HINTS: Readonly<Record<HttpPhaseName, string>>;
export declare function sumHttpPhases(phases: HttpPhases | undefined): number;
export declare function formatPhaseDuration(value: number): string;
export declare function hasHttpPhases(phases: HttpPhases | undefined): phases is HttpPhases;