fix: normalize all times to navStart, remove traceviewer model

lighthouse-core/audits/consistently-interactive.js

@@ -207,12 +207,11 @@ class ConsistentlyInteractiveMetric extends Audit {
     const devtoolsLog = artifacts.devtoolsLogs[Audit.DEFAULT_PASS];
     const computedArtifacts = [
       artifacts.requestNetworkRecords(devtoolsLog),
-      artifacts.requestTracingModel(trace),
       artifacts.requestTraceOfTab(trace),
     ];
 
     return Promise.all(computedArtifacts)
-      .then(([networkRecords, traceModel, traceOfTab]) => {
+      .then(([networkRecords, traceOfTab]) => {
         if (!traceOfTab.timestamps.firstMeaningfulPaint) {
           throw new Error('No firstMeaningfulPaint found in trace.');
         }
@@ -221,7 +220,7 @@ class ConsistentlyInteractiveMetric extends Audit {
           throw new Error('No domContentLoaded found in trace.');
         }
 
-        const longTasks = TracingProcessor.getMainThreadTopLevelEvents(traceModel, trace)
+        const longTasks = TracingProcessor.getMainThreadTopLevelEvents(traceOfTab)
             .filter(event => event.duration >= 50);
         const quietPeriodInfo = this.findOverlappingQuietPeriods(longTasks, networkRecords,
             traceOfTab);

lighthouse-core/audits/estimated-input-latency.js

@@ -35,13 +35,13 @@ class EstimatedInputLatency extends Audit {
     };
   }
 
-  static calculate(tabTrace, model, trace) {
+  static calculate(tabTrace) {
     const startTime = tabTrace.timings.firstMeaningfulPaint;
     if (!startTime) {
       throw new Error('No firstMeaningfulPaint event found in trace');
     }
 
-    const latencyPercentiles = TracingProcessor.getRiskToResponsiveness(model, trace, startTime);
+    const latencyPercentiles = TracingProcessor.getRiskToResponsiveness(tabTrace, startTime);
     const ninetieth = latencyPercentiles.find(result => result.percentile === 0.9);
     const rawValue = parseFloat(ninetieth.time.toFixed(1));
 
@@ -57,7 +57,7 @@ class EstimatedInputLatency extends Audit {
 
     return {
       score: Math.round(score),
-      optimalValue: this.meta.optimalValue,
+      optimalValue: EstimatedInputLatency.meta.optimalValue,
       rawValue,
       displayValue: Util.formatMilliseconds(rawValue, 1),
       extendedInfo: {
@@ -76,13 +76,8 @@ class EstimatedInputLatency extends Audit {
   static audit(artifacts) {
     const trace = artifacts.traces[this.DEFAULT_PASS];
 
-    const pending = [
-      artifacts.requestTraceOfTab(trace),
-      artifacts.requestTracingModel(trace)
-    ];
-    return Promise.all(pending).then(([tabTrace, model]) => {
-      return EstimatedInputLatency.calculate(tabTrace, model, trace);
-    });
+    return artifacts.requestTraceOfTab(trace)
+        .then(EstimatedInputLatency.calculate);
   }
 }
 

lighthouse-core/audits/time-to-interactive.js

@@ -63,7 +63,7 @@ class TTIMetric extends Audit {
 
       // Get our expected latency for the time window
       const latencies = TracingProcessor.getRiskToResponsiveness(
-        data.model, data.trace, startTime, endTime, percentiles);
+        data.tabTrace, startTime, endTime, percentiles);
       const estLatency = latencies[0].time;
       foundLatencies.push({
         estLatency: estLatency,
@@ -159,10 +159,9 @@ class TTIMetric extends Audit {
         debugString = `Trace error: ${err.message}`;
         return null;
       }),
-      artifacts.requestTraceOfTab(trace),
-      artifacts.requestTracingModel(trace)
+      artifacts.requestTraceOfTab(trace)
     ];
-    return Promise.all(pending).then(([speedline, tabTrace, model]) => {
+    return Promise.all(pending).then(([speedline, tabTrace]) => {
       // frame monotonic timestamps from speedline are in ms (ts / 1000), so we'll match
       //   https://github.com/pmdartus/speedline/blob/123f512632a/src/frame.js#L86
       const fMPtsInMS = tabTrace.timestamps.firstMeaningfulPaint;
@@ -188,7 +187,7 @@ class TTIMetric extends Audit {
       }
 
       const times = {fmpTiming, visuallyReadyTiming, traceEndTiming};
-      const data = {tabTrace, model, trace};
+      const data = {tabTrace, trace};
       const timeToInteractive = TTIMetric.findTTIAlpha(times, data);
       const timeToInteractiveB = TTIMetric.findTTIAlphaFMPOnly(times, data);
       const timeToInteractiveC = TTIMetric.findTTIAlphaFMPOnly5s(times, data);

lighthouse-core/closure/typedefs/ComputedArtifacts.js

@@ -9,14 +9,31 @@
  * @externs
  */
 
+/** @typedef
+ * {{
+ *   navigationStart: number,
+ *   firstPaint: number,
+ *   firstContentfulPaint: number,
+ *   firstMeaningfulPaint: number,
+ *   traceEnd: number,
+ *   onLoad: number,
+ *   domContentLoaded: number,
+ * }}
+ */
+let TraceTimes;
+
 /** @typedef
   {{
+    timings: !TraceTimes,
+    timestamps: !TraceTimes,
     processEvents: !Array<!TraceEvent>,
+    mainThreadEvents: !Array<!TraceEvent>,
     startedInPageEvt: !TraceEvent,
     navigationStartEvt: !TraceEvent,
     firstPaintEvt: TraceEvent,
     firstContentfulPaintEvt: TraceEvent,
-    firstMeaningfulPaintEvt: TraceEvent
+    firstMeaningfulPaintEvt: TraceEvent,
+    onLoadEvt: TraceEvent,
   }} */
 let TraceOfTabArtifact;
 

lighthouse-core/gather/computed/first-interactive.js

@@ -164,12 +164,10 @@ class FirstInteractive extends ComputedArtifact {
   }
 
   /**
-   * @param {!Trace} trace
-   * @param {!tr.Model} traceModel
    * @param {!TraceOfTabArtifact} traceOfTab
    * @return {{timeInMs: number, timestamp: number}}
    */
-  computeWithArtifacts(trace, traceModel, traceOfTab) {
+  computeWithArtifacts(traceOfTab) {
     const navStart = traceOfTab.timestamps.navigationStart;
     const FMP = traceOfTab.timings.firstMeaningfulPaint;
     const DCL = traceOfTab.timings.domContentLoaded;
@@ -183,7 +181,7 @@ class FirstInteractive extends ComputedArtifact {
       throw new Error(`No ${FMP ? 'domContentLoaded' : 'firstMeaningfulPaint'} event in trace`);
     }
 
-    const longTasksAfterFMP = TracingProcessor.getMainThreadTopLevelEvents(traceModel, trace, FMP)
+    const longTasksAfterFMP = TracingProcessor.getMainThreadTopLevelEvents(traceOfTab, FMP)
         .filter(evt => evt.duration >= LONG_TASK_THRESHOLD);
     const firstInteractive = FirstInteractive.findQuietWindow(FMP, traceEnd, longTasksAfterFMP);
 
@@ -200,11 +198,8 @@ class FirstInteractive extends ComputedArtifact {
    * @return {{timeInMs: number, timestamp: number}}
    */
   compute_(trace, artifacts) {
-    return Promise.all([
-      artifacts.requestTracingModel(trace),
-      artifacts.requestTraceOfTab(trace),
-    ]).then(([traceModel, traceOfTab]) => {
-      return this.computeWithArtifacts(trace, traceModel, traceOfTab);
+    return artifacts.requestTraceOfTab(trace).then(traceOfTab => {
+      return this.computeWithArtifacts(traceOfTab);
     });
   }
 }

lighthouse-core/gather/computed/trace-of-tab.js

@@ -26,7 +26,7 @@ class TraceOfTab extends ComputedArtifact {
 
   /**
    * @param {{traceEvents: !Array}} trace
-   * @return {!{processEvents: !Array<TraceEvent>, startedInPageEvt: TraceEvent, navigationStartEvt: TraceEvent, firstContentfulPaintEvt: TraceEvent, firstMeaningfulPaintEvt: TraceEvent}}
+   * @return {!TraceOfTabArtifact}
   */
   compute_(trace) {
     // Parse the trace for our key events and sort them by timestamp.
@@ -86,6 +86,9 @@ class TraceOfTab extends ComputedArtifact {
       .filter(e => e.pid === startedInPageEvt.pid)
       .sort((event0, event1) => event0.ts - event1.ts);
 
+    const mainThreadEvents = processEvents
+      .filter(e => e.tid === startedInPageEvt.tid);
+
     const traceEnd = trace.traceEvents.reduce((max, evt) => {
       return max.ts > evt.ts ? max : evt;
     });
@@ -95,7 +98,7 @@ class TraceOfTab extends ComputedArtifact {
       firstPaint,
       firstContentfulPaint,
       firstMeaningfulPaint,
-      traceEnd,
+      traceEnd: {ts: traceEnd.ts + (traceEnd.dur || 0)},
       onLoad,
       domContentLoaded,
     };
@@ -112,7 +115,8 @@ class TraceOfTab extends ComputedArtifact {
       timings,
       timestamps,
       processEvents,
-      startedInPageEvt: startedInPageEvt,
+      mainThreadEvents,
+      startedInPageEvt,
       navigationStartEvt: navigationStart,
       firstPaintEvt: firstPaint,
       firstContentfulPaintEvt: firstContentfulPaint,