lighthouse/core/computed/metrics/total-blocking-time.d.ts

Automated auditing, performance metrics, and best practices for the web.

export { TotalBlockingTimeComputed as TotalBlockingTime };
declare const TotalBlockingTimeComputed: typeof TotalBlockingTime & {
    request: (dependencies: import("../../index.js").Artifacts.MetricComputationDataInput, context: LH.Artifacts.ComputedContext) => Promise<import("../../index.js").Artifacts.Metric | import("../../index.js").Artifacts.LanternMetric>;
};
/**
 * @fileoverview This audit determines Total Blocking Time.

 * We define Blocking Time as any time interval in the loading timeline where task length exceeds
 * 50ms. For example, if there is a 110ms main thread task, the last 60ms of it is blocking time.
 * Total Blocking Time is the sum of all Blocking Time between First Contentful Paint and
 * Interactive Time (TTI).
 *
 * This is a new metric designed to accompany Time to Interactive. TTI is strict and does not
 * reflect incremental improvements to the site performance unless the improvement concerns the last
 * long task. Total Blocking Time on the other hand is designed to be much more responsive
 * to smaller improvements to main thread responsiveness.
 */
declare class TotalBlockingTime extends ComputedMetric {
    /**
     * @param {LH.Artifacts.MetricComputationData} data
     * @param {LH.Artifacts.ComputedContext} context
     * @return {Promise<LH.Artifacts.LanternMetric>}
     */
    static computeSimulatedMetric(data: LH.Artifacts.MetricComputationData, context: LH.Artifacts.ComputedContext): Promise<LH.Artifacts.LanternMetric>;
}
import ComputedMetric from './metric.js';
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