export interface BundleMetric {
    total: number;
    transformed: number;
    cacheHits: number;
    elapsed: number;
}
export interface BundleMetrics {
    runtimeSet: number;
    html: BundleMetric;
    js: BundleMetric;
    css: BundleMetric;
}
export declare function formatDebugFileList(files: Set<string>, limit?: number): string;
export declare function createEmptyMetrics(): BundleMetrics;
export declare function measureElapsed(start: number): number;
export declare function formatCacheHitRate(metric: BundleMetric): string;
export declare function formatMs(value: number): string;