* Computes the weighted-average of the score of the list of items. * @param {Array<{score: number|null, weight: number}>} items * @retur

* @param {NetworkRequest} record * @return {Lantern.Types.NetworkRequest<NetworkRequest>}

* There should *always* be at least one top level event, having 0 typically means something is * drastically wrong with the trace and we should

* Cache native functions/objects inside window so we are sure polyfills do not overwrite the * native implementations when the page loads.

* Builds the initial calls with no duration from samples. Their * purpose is to be merged with the trace event array being parsed so * t

* @param {LH.Artifacts.LinkElement[]} linkElements * @return {CanonicalURLData}

* * @param {LH.Gatherer.Driver} driver * @param {LH.Artifacts.ImageElement[]} elements

* @param {LH.Gatherer.Driver['executionContext']} executionContext * @return {Promise<LH.Artifacts['Stacks']>}

* @param {WellDefinedImage} image * @return {{url: string, node: LH.Audit.Details.NodeValue, displayedAspectRatio: string, actualAspectRatio: s

* Approximate speed index using layout events from the simulated node timings. * The layout-based speed index is the weighted average of the en

* Computes timings of trace events of key trace events in milliseconds since the time origin * in addition to the standard microsecond monotoni

* Computes the time origin using the specified method. * * - firstResourceSendRequest * Uses the time that the very first

* Computes the last observable timestamp in a set of trace events. * * @param {Array<LH.TraceEvent>} events * @param {LH.TraceEve

* @param {LayoutShiftEvent[]} allFrameShiftEvents * @param {LayoutShiftEvent[]} mainFrameShiftEvents

* @param {LH.DevtoolsLog} devtoolsLog * @return {Promise<Array<LH.Artifacts.NetworkRequest>>} networkRecords

* @param {Finding[][]} syntaxFindings * @param {string[]} rawCsps * @return {LH.Audit.Details.TableItem[]}

* Calculate timestamps using timeDeltas. Some CPU profile formats, * like the ones contained in traces have timeDeltas instead of * time

* @return {Error}

* @return {Error}