* Evaluate an expression in the given execution context; an undefined contextId implies the main * page without isolation. * @param {str

* Returns the cached isolated execution context ID or creates a new execution context for the main * frame. The cached execution context is cle

* @param {LH.Crdp.Network.Response} response * @param {number} timestamp in seconds * @param {LH.Crdp.Network.ResponseReceivedEvent['typ

* LR gets additional, accurate timing information from its underlying fetch infrastructure. This * is passed in via X-Headers similar to 'X-To

* LR loses transfer size information, but passes it in the 'X-TotalFetchedSize' header. * 'X-TotalFetchedSize' is the canonical transfer size i

* @template T * @param {Promise<T>} promise * @param {number} ms

* Return the connection currently being used to fetch a request. If no connection * currently being used for this request, an error will be thr

* This catches typos in the `key` property of a heading definition of table/opportunity details. * Throws an error if any of keys referenced by

* Calculates cumulative layout shifts per cluster (session) of LayoutShift * events -- where a new cluster is created when there's a gap of mor

* Computes a score between 0 and 1 based on the measured `value`. Score is determined by * considering a log-normal distribution governed by tw

* We attempt to start nodes by their observed start time using the request priority as a tie breaker. * When simulating, just because a low pri

* Returns the maximum LCP event across all frames in `events`. * Sets `invalidated` flag if LCP of every frame is invalidated. *

* @license * Copyright 2021 Google LLC * SPDX-License-Identifier: Apache-2.0

* @return {Error}

* @return {Error}

* @param {any} err * @param {LH.Config.Settings} settings

* Routes network events to their handlers, so we can construct networkRecords * @param {LH.Protocol.RawEventMessage} event

* Estimates the RTT to each origin by examining observed network timing information. * Attempts to use the most accurate information first and

* Sorts and filters trace events by timestamp and respecting the nesting structure inherent to * parent/child event relationships. *