core(lantern): resolve some differences when using trace

core/audits/byte-efficiency/byte-efficiency-audit.js

@@ -120,7 +120,7 @@ class ByteEfficiencyAudit extends Audit {
     const originalTransferSizes = new Map();
     graph.traverse(node => {
       if (node.type !== 'network') return;
-      const wastedBytes = wastedBytesByUrl.get(node.record.url);
+      const wastedBytes = wastedBytesByUrl.get(node.request.url);
       if (!wastedBytes) return;
 
       const original = node.request.transferSize;

core/audits/byte-efficiency/offscreen-images.js

@@ -128,7 +128,7 @@ class OffscreenImages extends ByteEfficiencyAudit {
       if (node.type === 'cpu' && timing.duration >= 50) {
         lastLongTaskStartTime = Math.max(lastLongTaskStartTime, timing.startTime);
       } else if (node.type === 'network') {
-        startTimesByURL.set(node.record.url, timing.startTime);
+        startTimesByURL.set(node.request.url, timing.startTime);
       }
     }
 

core/audits/byte-efficiency/render-blocking-resources.js

@@ -94,7 +94,7 @@ function computeStackSpecificTiming(node, nodeTiming, Stacks) {
     // https://github.com/ampproject/amphtml/blob/8e03ac2f315774070651584a7e046ff24212c9b1/src/font-stylesheet-timeout.js#L54-L59
     // Any potential savings must only include time spent on AMP stylesheet nodes before 2.1 seconds.
     if (node.type === BaseNode.TYPES.NETWORK &&
-        node.record.resourceType === NetworkRequest.TYPES.Stylesheet &&
+        node.request.resourceType === NetworkRequest.TYPES.Stylesheet &&
         nodeTiming.endTime > 2100) {
       stackSpecificTiming.endTime = Math.max(nodeTiming.startTime, 2100);
       stackSpecificTiming.duration = stackSpecificTiming.endTime - stackSpecificTiming.startTime;
@@ -228,11 +228,11 @@ class RenderBlockingResources extends Audit {
       if (node.type !== BaseNode.TYPES.NETWORK) return !canDeferRequest;
 
       const isStylesheet =
-        node.record.resourceType === NetworkRequest.TYPES.Stylesheet;
+        node.request.resourceType === NetworkRequest.TYPES.Stylesheet;
       if (canDeferRequest && isStylesheet) {
         // We'll inline the used bytes of the stylesheet and assume the rest can be deferred
-        const wastedBytes = wastedCssBytesByUrl.get(node.record.url) || 0;
-        totalChildNetworkBytes += (node.record.transferSize || 0) - wastedBytes;
+        const wastedBytes = wastedCssBytesByUrl.get(node.request.url) || 0;
+        totalChildNetworkBytes += (node.request.transferSize || 0) - wastedBytes;
       }
       return !canDeferRequest;
     });
@@ -247,7 +247,7 @@ class RenderBlockingResources extends Audit {
     ));
 
     // Add the inlined bytes to the HTML response
-    const originalTransferSize = minimalFCPGraph.record.transferSize;
+    const originalTransferSize = minimalFCPGraph.request.transferSize;
     const safeTransferSize = originalTransferSize || 0;
     minimalFCPGraph.request.transferSize = safeTransferSize + totalChildNetworkBytes;
     const estimateAfterInline = simulator.simulate(minimalFCPGraph).timeInMs;

core/audits/dobetterweb/uses-http2.js

@@ -87,9 +87,9 @@ class UsesHTTP2Audit extends Audit {
     const originalProtocols = new Map();
     graph.traverse(node => {
       if (node.type !== 'network') return;
-      if (!urlsToChange.has(node.record.url)) return;
+      if (!urlsToChange.has(node.request.url)) return;
 
-      originalProtocols.set(node.request.requestId, node.record.protocol);
+      originalProtocols.set(node.request.requestId, node.request.protocol);
       node.request.protocol = 'h2';
     });
 

core/audits/prioritize-lcp-image.js

@@ -222,7 +222,7 @@ class PrioritizeLcpImage extends Audit {
       wastedMs,
       results: [{
         node: Audit.makeNodeItem(lcpElement.node),
-        url: lcpNode.record.url,
+        url: lcpNode.request.url,
         wastedMs,
       }],
     };

core/audits/uses-rel-preconnect.js

@@ -146,14 +146,14 @@ class UsesRelPreconnectAudit extends Audit {
     /** @type {Set<string>} */
     const lcpGraphURLs = new Set();
     lcpGraph.traverse(node => {
-      if (node.type === 'network') lcpGraphURLs.add(node.record.url);
+      if (node.type === 'network') lcpGraphURLs.add(node.request.url);
     });
 
     const fcpGraph =
       await LanternFirstContentfulPaint.getPessimisticGraph(pageGraph, processedNavigation);
     const fcpGraphURLs = new Set();
     fcpGraph.traverse(node => {
-      if (node.type === 'network') fcpGraphURLs.add(node.record.url);
+      if (node.type === 'network') fcpGraphURLs.add(node.request.url);
     });
 
     /** @type {Map<string, LH.Artifacts.NetworkRequest[]>}  */

core/computed/metrics/lantern-metric.js

@@ -52,6 +52,7 @@ async function getComputationDataParamsFromTrace(data, context) {
   }
 
   const {trace, URL} = data;
+  // TODO(15841): use computed artifact.
   const {graph} = await createGraphFromTrace(URL, trace, context);
   const processedNavigation = await ProcessedNavigation.request(data.trace, context);
   const simulator = data.simulator || (await LoadSimulator.request(data, context));

core/lib/lantern/network-node.js

@@ -18,7 +18,6 @@ const NON_NETWORK_SCHEMES = [
 ];
 
 /**
- * Use `NetworkRequest.isNonNetworkRequest(req)` if working with a request.
  * Note: the `protocol` field from CDP can be 'h2', 'http', (not 'https'!) or it'll be url's scheme.
  *   https://source.chromium.org/chromium/chromium/src/+/main:content/browser/devtools/protocol/network_handler.cc;l=598-611;drc=56d4a9a9deb30be73adcee8737c73bcb2a5ab64f
  * However, a `new URL(href).protocol` has a colon suffix.

core/lib/lantern/page-dependency-graph.js

@@ -712,6 +712,19 @@ class PageDependencyGraph {
     if (request.args.data.initiator?.fetchType === 'xmlhttprequest') {
       // @ts-expect-error yes XHR is a valid ResourceType. TypeScript const enums are so unhelpful.
       resourceType = 'XHR';
+    } else if (request.args.data.initiator?.fetchType === 'fetch') {
+      // @ts-expect-error yes Fetch is a valid ResourceType. TypeScript const enums are so unhelpful.
+      resourceType = 'Fetch';
+    }
+
+    // TODO: set decodedBodyLength for data urls in Trace Engine.
+    let resourceSize = request.args.data.decodedBodyLength ?? 0;
+    if (url.protocol === 'data:' && resourceSize === 0) {
+      const needle = 'base64,';
+      const index = url.pathname.indexOf(needle);
+      if (index !== -1) {
+        resourceSize = atob(url.pathname.substring(index + needle.length)).length;
+      }
     }
 
     return {
@@ -727,7 +740,7 @@ class PageDependencyGraph {
       responseHeadersEndTime: request.args.data.syntheticData.downloadStart / 1000,
       networkEndTime: request.args.data.syntheticData.finishTime / 1000,
       transferSize: request.args.data.encodedDataLength,
-      resourceSize: request.args.data.decodedBodyLength,
+      resourceSize,
       fromDiskCache: request.args.data.syntheticData.isDiskCached,
       fromMemoryCache: request.args.data.syntheticData.isMemoryCached,
       isLinkPreload: request.args.data.isLinkPreload,
@@ -800,23 +813,42 @@ class PageDependencyGraph {
       const requestChain = [];
       for (const redirect of redirects) {
         const redirectedRequest = structuredClone(request);
-        if (redirectedRequest.timing) {
-          // TODO: These are surely wrong for when there is more than one redirect. Would be
-          // simpler if each redirect remembered it's `timing` object in this `redirects` array.
-          redirectedRequest.timing.requestTime = redirect.ts / 1000 / 1000;
-          redirectedRequest.timing.receiveHeadersStart -= redirect.dur / 1000 / 1000;
-          redirectedRequest.timing.receiveHeadersEnd -= redirect.dur / 1000 / 1000;
-          redirectedRequest.rendererStartTime = redirect.ts / 1000;
-          redirectedRequest.networkRequestTime = redirect.ts / 1000;
-          redirectedRequest.networkEndTime = (redirect.ts + redirect.dur) / 1000;
-          redirectedRequest.responseHeadersEndTime =
-            redirectedRequest.timing.requestTime * 1000 +
-            redirectedRequest.timing.receiveHeadersEnd;
-        }
+
+        redirectedRequest.networkRequestTime = redirect.ts / 1000;
+        redirectedRequest.rendererStartTime = redirectedRequest.networkRequestTime;
+
+        redirectedRequest.networkEndTime = (redirect.ts + redirect.dur) / 1000;
+        redirectedRequest.responseHeadersEndTime = redirectedRequest.networkEndTime;
+
+        redirectedRequest.timing = {
+          requestTime: redirectedRequest.networkRequestTime / 1000,
+          receiveHeadersStart: redirectedRequest.responseHeadersEndTime,
+          receiveHeadersEnd: redirectedRequest.responseHeadersEndTime,
+          proxyStart: -1,
+          proxyEnd: -1,
+          dnsStart: -1,
+          dnsEnd: -1,
+          connectStart: -1,
+          connectEnd: -1,
+          sslStart: -1,
+          sslEnd: -1,
+          sendStart: -1,
+          sendEnd: -1,
+          workerStart: -1,
+          workerReady: -1,
+          workerFetchStart: -1,
+          workerRespondWithSettled: -1,
+          pushStart: -1,
+          pushEnd: -1,
+        };
+
         redirectedRequest.url = redirect.url;
         redirectedRequest.parsedURL = this._createParsedUrl(redirect.url);
         // TODO: TraceEngine is not retaining the actual status code.
         redirectedRequest.statusCode = 302;
+        redirectedRequest.resourceType = undefined;
+        // TODO: TraceEngine is not retaining transfer size of redirected request.
+        redirectedRequest.transferSize = 400;
         requestChain.push(redirectedRequest);
         lanternRequests.push(redirectedRequest);
       }

core/lib/lantern/simulator/simulator.js

@@ -34,7 +34,7 @@ const NodeState = {
   Complete: 3,
 };
 
-/** @type {Record<NetworkNode['record']['priority'], number>} */
+/** @type {Record<NetworkNode['request']['priority'], number>} */
 const PriorityStartTimePenalty = {
   VeryHigh: 0,
   High: 0.25,

core/test/audits/byte-efficiency/byte-efficiency-audit-test.js

@@ -18,11 +18,6 @@ const trace = readJson('../../fixtures/artifacts/paul/trace.json', import.meta);
 const devtoolsLog = readJson('../../fixtures/artifacts/paul/devtoolslog.json', import.meta);
 
 describe('Byte efficiency base audit', () => {
-  // TODO(15841): investigate failures
-  if (process.env.INTERNAL_LANTERN_USE_TRACE !== undefined) {
-    return;
-  }
-
   let simulator;
   let metricComputationInput;
 
@@ -131,7 +126,7 @@ describe('Byte efficiency base audit', () => {
     }, simulator, metricComputationInput, {computedCache: new Map()});
 
     assert.equal(result.metricSavings.FCP, 900);
-    assert.equal(result.metricSavings.LCP, 1350);
+    assert.equal(result.metricSavings.LCP, 900);
   });
 
   it('should use LCP request savings if larger than LCP graph savings', async () => {

core/test/audits/byte-efficiency/duplicated-javascript-test.js

@@ -313,11 +313,6 @@ describe('DuplicatedJavascript computed artifact', () => {
   });
 
   it('.audit', async () => {
-    // TODO(15841): investigate failures
-    if (process.env.INTERNAL_LANTERN_USE_TRACE !== undefined) {
-      return;
-    }
-
     const artifacts = await loadArtifacts(`${LH_ROOT}/core/test/fixtures/artifacts/cnn`);
     const ultraSlowThrottling = {rttMs: 150, throughputKbps: 100, cpuSlowdownMultiplier: 8};
     const settings = {throttlingMethod: 'simulate', throttling: ultraSlowThrottling};

core/test/audits/byte-efficiency/offscreen-images-test.js

@@ -60,11 +60,6 @@ function generateImage({
 }
 
 describe('OffscreenImages audit', () => {
-  // TODO(15841): investigate test failures
-  if (process.env.INTERNAL_LANTERN_USE_TRACE !== undefined) {
-    return;
-  }
-
   let context;
   const DEFAULT_DIMENSIONS = {innerWidth: 1920, innerHeight: 1080};
 

core/test/audits/byte-efficiency/render-blocking-resources-test.js

@@ -20,11 +20,6 @@ const devtoolsLog = readJson('../../fixtures/artifacts/render-blocking/devtoolsl
 const mobileSlow4G = constants.throttling.mobileSlow4G;
 
 describe('Render blocking resources audit', () => {
-  // TODO(15841): investigate failures
-  if (process.env.INTERNAL_LANTERN_USE_TRACE !== undefined) {
-    return;
-  }
-
   it('evaluates render blocking input correctly', async () => {
     const artifacts = {
       URL: getURLArtifactFromDevtoolsLog(devtoolsLog),

core/test/audits/dobetterweb/dom-size-test.js

@@ -18,19 +18,17 @@ describe('DOMSize audit', () => {
 
   beforeEach(() => {
     const mainDocumentUrl = 'https://example.com/';
-
+    const networkRecords = [{url: mainDocumentUrl, priority: 'High'}];
     const trace = createTestTrace({
       topLevelTasks: [
         {ts: 1000, duration: 1000, children: [
           {ts: 1100, duration: 200, eventName: 'ScheduleStyleRecalculation'},
         ]},
       ],
+      networkRecords,
     });
 
-    const devtoolsLog = networkRecordsToDevtoolsLog([{
-      url: mainDocumentUrl,
-      priority: 'High',
-    }]);
+    const devtoolsLog = networkRecordsToDevtoolsLog(networkRecords);
 
     artifacts = {
       DOMStats: {
@@ -55,11 +53,6 @@ describe('DOMSize audit', () => {
   });
 
   it('calculates score hitting mid distribution', async () => {
-    // TODO(15841): investigate failures
-    if (process.env.INTERNAL_LANTERN_USE_TRACE !== undefined) {
-      return;
-    }
-
     const auditResult = await DOMSize.audit(artifacts, context);
     assert.equal(auditResult.score, 0.43);
     assert.equal(auditResult.numericValue, 1500);

core/test/audits/largest-contentful-paint-element-test.js

@@ -22,7 +22,7 @@ function mockNetworkRecords() {
     isLinkPreload: false,
     networkRequestTime: 0,
     networkEndTime: 500,
-    timing: {sendEnd: 0, receiveHeadersEnd: 500},
+    responseHeadersEndTime: 500,
     responseHeadersTransferSize: 400,
     transferSize: 400,
     url: requestedUrl,
@@ -68,11 +68,6 @@ function mockNetworkRecords() {
 }
 
 describe('Performance: largest-contentful-paint-element audit', () => {
-  // TODO(15841): investigate failures
-  if (process.env.INTERNAL_LANTERN_USE_TRACE !== undefined) {
-    return;
-  }
-
   it('correctly surfaces the LCP element', async () => {
     const networkRecords = mockNetworkRecords();
     const artifacts = {
@@ -110,8 +105,8 @@ describe('Performance: largest-contentful-paint-element audit', () => {
 
     expect(auditResult.score).toEqual(0);
     expect(auditResult.notApplicable).toBeUndefined();
-    expect(auditResult.displayValue).toBeDisplayString('5,800\xa0ms');
-    expect(auditResult.metricSavings).toEqual({LCP: 3304}); // 5804 - 2500 (p10 mobile)
+    expect(auditResult.displayValue).toBeDisplayString('5,340\xa0ms');
+    expect(auditResult.metricSavings).toEqual({LCP: 2837}); // calculated LCP - 2500 (p10 mobile)
     expect(auditResult.details.items).toHaveLength(2);
     expect(auditResult.details.items[0].items).toHaveLength(1);
     expect(auditResult.details.items[0].items[0].node.path).toEqual('1,HTML,3,BODY,5,DIV,0,HEADER');
@@ -123,11 +118,11 @@ describe('Performance: largest-contentful-paint-element audit', () => {
     expect(auditResult.details.items[1].items[0].phase).toBeDisplayString('TTFB');
     expect(auditResult.details.items[1].items[0].timing).toBeCloseTo(800, 0.1);
     expect(auditResult.details.items[1].items[1].phase).toBeDisplayString('Load Delay');
-    expect(auditResult.details.items[1].items[1].timing).toBeCloseTo(651, 0.1);
+    expect(auditResult.details.items[1].items[1].timing).toBeCloseTo(534.2, 0.1);
     expect(auditResult.details.items[1].items[2].phase).toBeDisplayString('Load Time');
-    expect(auditResult.details.items[1].items[2].timing).toBeCloseTo(1813.7, 0.1);
+    expect(auditResult.details.items[1].items[2].timing).toBeCloseTo(1667.8, 0.1);
     expect(auditResult.details.items[1].items[3].phase).toBeDisplayString('Render Delay');
-    expect(auditResult.details.items[1].items[3].timing).toBeCloseTo(2539.2, 0.1);
+    expect(auditResult.details.items[1].items[3].timing).toBeCloseTo(2334.9, 0.1);
   });
 
   it('doesn\'t throw an error when there is nothing to show', async () => {

core/test/audits/prioritize-lcp-image-test.js

@@ -16,11 +16,6 @@ const scriptUrl = 'http://www.example.com/script.js';
 const imageUrl = 'http://www.example.com/image.png';
 
 describe('Performance: prioritize-lcp-image audit', () => {
-  // TODO(15841): fix createTestTrace, cycles
-  if (process.env.INTERNAL_LANTERN_USE_TRACE !== undefined) {
-    return;
-  }
-
   const mockArtifacts = (networkRecords, URL) => {
     return {
       GatherContext: {gatherMode: 'navigation'},