/**
 * @license
 * Copyright 2019 Google LLC
 * SPDX-License-Identifier: BSD-3-Clause
 */
import { BrowserConfig } from './browser.js';
import { ResultStatsWithDifferences } from './stats.js';
import { BenchmarkResult, Measurement } from './types.js';
export interface JsonOutputFile {
    benchmarks: Benchmark[];
}
interface BrowserConfigResult extends BrowserConfig {
    userAgent?: string;
}
interface Benchmark {
    name: string;
    bytesSent: number;
    version?: string;
    measurement: Measurement;
    browser?: BrowserConfigResult;
    mean: ConfidenceInterval;
    differences: Array<Difference | null>;
    samples: number[];
}
interface Difference {
    absolute: ConfidenceInterval;
    percentChange: ConfidenceInterval;
}
interface ConfidenceInterval {
    low: number;
    high: number;
}
export declare function jsonOutput(results: ResultStatsWithDifferences[]): JsonOutputFile;
export interface LegacyJsonOutputFormat {
    benchmarks: BenchmarkResult[];
    datetime: string;
    system: {
        cpu: {
            manufacturer: string;
            model: string;
            family: string;
            speed: string;
            cores: number;
        };
        load: {
            average: number;
            current: number;
        };
        battery: {
            hasBattery: boolean;
            connected: boolean;
        };
        memory: {
            total: number;
            free: number;
            used: number;
            active: number;
            available: number;
        };
    };
}
export declare function legacyJsonOutput(results: BenchmarkResult[]): Promise<LegacyJsonOutputFormat>;
export {};