DMleadgen
46d973904b
Next.js website for Rocky Mountain Vending company featuring: - Product catalog with Stripe integration - Service areas and parts pages - Admin dashboard with Clerk authentication - SEO optimized pages with JSON-LD structured data Co-authored-by: Cursor <cursoragent@cursor.com>
1 line
No EOL
36 KiB
Text
1 line
No EOL
36 KiB
Text
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Copyright 2023 The Chromium Authors. All rights reserved.\n// Use of this source code is governed by a BSD-style license that can be\n// found in the LICENSE file.\n\nimport type * as Protocol from '../../../generated/protocol.js';\nimport type * as CPUProfile from '../../cpu_profile/cpu_profile.js';\nimport * as Types from '../types/types.js';\n\nimport {milliToMicro} from './Timing.js';\nimport {extractSampleTraceId, makeProfileCall, mergeEventsInOrder, sortTraceEventsInPlace} from './Trace.js';\n\n/**\n * This is a helper that integrates CPU profiling data coming in the\n * shape of samples, with trace events. Samples indicate what the JS\n * stack trace looked at a given point in time, but they don't have\n * duration. The SamplesIntegrator task is to make an approximation\n * of what the duration of each JS call was, given the sample data and\n * given the trace events profiled during that time. At the end of its\n * execution, the SamplesIntegrator returns an array of ProfileCalls\n * (under SamplesIntegrator::buildProfileCalls()), which\n * represent JS calls, with a call frame and duration. These calls have\n * the shape of a complete trace events and can be treated as flame\n * chart entries in the timeline.\n *\n * The approach to build the profile calls consists in tracking the\n * current stack as the following events happen (in order):\n * 1. A sample was done.\n * 2. A trace event started.\n * 3. A trace event ended.\n * Depending on the event and on the data that's coming with it the\n * stack is updated by adding or removing JS calls to it and updating\n * the duration of the calls in the tracking stack.\n *\n * note: Although this approach has been implemented since long ago, and\n * is relatively efficient (adds a complexity over the trace parsing of\n * O(n) where n is the number of samples) it has proven to be faulty.\n * It might be worthwhile experimenting with improvements or with a\n * completely different approach. Improving the approach is tracked in\n * crbug.com/1417439\n */\nexport class SamplesIntegrator {\n /**\n * The result of running the samples integrator. Holds the JS calls\n * with their approximated duration after integrating samples into the\n * trace event tree.\n */\n #constructedProfileCalls: Types.Events.SyntheticProfileCall[] = [];\n /**\n * tracks the state of the JS stack at each point in time to update\n * the profile call durations as new events arrive. This doesn't only\n * happen with new profile calls (in which case we would compare the\n * stack in them) but also with trace events (in which case we would\n * update the duration of the events we are tracking at the moment).\n */\n #currentJSStack: Types.Events.SyntheticProfileCall[] = [];\n /**\n * Process holding the CPU profile and trace events.\n */\n #processId: Types.Events.ProcessID;\n /**\n * Thread holding the CPU profile and trace events.\n */\n #threadId: Types.Events.ThreadID;\n /**\n * Tracks the depth of the JS stack at the moment a trace event starts\n * or ends. It is assumed that for the duration of a trace event, the\n * JS stack's depth cannot decrease, since JS calls that started\n * before a trace event cannot end during the trace event. So as trace\n * events arrive, we store the \"locked\" amount of JS frames that were\n * in the stack before the event came.\n */\n #lockedJsStackDepth: number[] = [];\n /**\n * Used to keep track when samples should be integrated even if they\n * are not children of invocation trace events. This is useful in\n * cases where we can be missing the start of JS invocation events if\n * we start tracing half-way through.\n */\n #fakeJSInvocation = false;\n /**\n * The parsed CPU profile, holding the tree hierarchy of JS frames and\n * the sample data.\n */\n #profileModel: CPUProfile.CPUProfileDataModel.CPUProfileDataModel;\n /**\n * Because GC nodes don't have a stack, we artificially add a stack to\n * them which corresponds to that of the previous sample. This map\n * tracks which node is used for the stack of a GC call.\n * Note that GC samples are not shown in the flamechart, however they\n * are used during the construction of for profile calls, as we can\n * infer information about the duration of the executed code when a\n * GC node is sampled.\n */\n #nodeForGC = new Map<Types.Events.SyntheticProfileCall, CPUProfile.ProfileTreeModel.ProfileNode>();\n\n #engineConfig: Types.Configuration.Configuration;\n #profileId: Types.Events.ProfileID;\n\n /**\n * Keeps track of the individual samples from the CPU Profile.\n * Only used with Debug Mode experiment enabled.\n */\n jsSampleEvents: Types.Events.SyntheticJSSample[] = [];\n\n constructor(\n profileModel: CPUProfile.CPUProfileDataModel.CPUProfileDataModel, profileId: Types.Events.ProfileID,\n pid: Types.Events.ProcessID, tid: Types.Events.ThreadID, configuration?: Types.Configuration.Configuration) {\n this.#profileModel = profileModel;\n this.#threadId = tid;\n this.#processId = pid;\n this.#engineConfig = configuration || Types.Configuration.defaults();\n this.#profileId = profileId;\n }\n\n buildProfileCalls(traceEvents: Types.Events.Event[]): Types.Events.SyntheticProfileCall[] {\n const mergedEvents = mergeEventsInOrder(traceEvents, this.callsFromProfileSamples());\n const stack = [];\n for (let i = 0; i < mergedEvents.length; i++) {\n const event = mergedEvents[i];\n // Because instant trace events have no duration, they don't provide\n // useful information for possible changes in the duration of calls\n // in the JS stack.\n if (event.ph === Types.Events.Phase.INSTANT && !extractSampleTraceId(event)) {\n continue;\n }\n if (stack.length === 0) {\n if (Types.Events.isProfileCall(event)) {\n this.#onProfileCall(event);\n continue;\n }\n stack.push(event);\n this.#onTraceEventStart(event);\n continue;\n }\n\n const parentEvent = stack.at(-1);\n if (parentEvent === undefined) {\n continue;\n }\n const begin = event.ts;\n const parentBegin = parentEvent.ts;\n const parentDuration = parentEvent.dur || 0;\n const parentEnd = parentBegin + parentDuration;\n\n const startsAfterParent = begin >= parentEnd;\n if (startsAfterParent) {\n this.#onTraceEventEnd(parentEvent);\n stack.pop();\n i--;\n continue;\n }\n if (Types.Events.isProfileCall(event)) {\n this.#onProfileCall(event, parentEvent);\n continue;\n }\n this.#onTraceEventStart(event);\n stack.push(event);\n }\n while (stack.length) {\n const last = stack.pop();\n if (last) {\n this.#onTraceEventEnd(last);\n }\n }\n sortTraceEventsInPlace(this.jsSampleEvents);\n return this.#constructedProfileCalls;\n }\n\n #onTraceEventStart(event: Types.Events.Event): void {\n // Top level events cannot be nested into JS frames so we reset\n // the stack when we find one.\n if (event.name === Types.Events.Name.RUN_MICROTASKS || event.name === Types.Events.Name.RUN_TASK) {\n this.#lockedJsStackDepth = [];\n this.#truncateJSStack(0, event.ts);\n this.#fakeJSInvocation = false;\n }\n\n if (this.#fakeJSInvocation) {\n this.#truncateJSStack(this.#lockedJsStackDepth.pop() || 0, event.ts);\n this.#fakeJSInvocation = false;\n }\n this.#extractStackTrace(event);\n // Keep track of the call frames in the stack before the event\n // happened. For the duration of this event, these frames cannot\n // change (none can be terminated before this event finishes).\n //\n // Also, every frame that is opened after this event, is considered\n // to be a descendant of the event. So once the event finishes, the\n // frames that were opened after it, need to be closed (see\n // onEndEvent).\n //\n // TODO(crbug.com/1417439):\n // The assumption that every frame opened after an event is a\n // descendant of the event is incorrect. For example, a JS call that\n // parents a trace event might have been sampled after the event was\n // dispatched. In this case the JS call would be discarded if this\n // event isn't an invocation event, otherwise the call will be\n // considered a child of the event. In both cases, the result would\n // be incorrect.\n this.#lockedJsStackDepth.push(this.#currentJSStack.length);\n }\n\n #onProfileCall(event: Types.Events.SyntheticProfileCall, parent?: Types.Events.Event): void {\n if ((parent && Types.Events.isJSInvocationEvent(parent)) || this.#fakeJSInvocation) {\n this.#extractStackTrace(event);\n } else if (Types.Events.isProfileCall(event) && this.#currentJSStack.length === 0) {\n // Force JS Samples to show up even if we are not inside a JS\n // invocation event, because we can be missing the start of JS\n // invocation events if we start tracing half-way through. Pretend\n // we have a top-level JS invocation event.\n this.#fakeJSInvocation = true;\n const stackDepthBefore = this.#currentJSStack.length;\n this.#extractStackTrace(event);\n this.#lockedJsStackDepth.push(stackDepthBefore);\n }\n }\n\n #onTraceEventEnd(event: Types.Events.Event): void {\n // Because the event has ended, any frames that happened after\n // this event are terminated. Frames that are ancestors to this\n // event are extended to cover its ending.\n const endTime = Types.Timing.Micro(event.ts + (event.dur ?? 0));\n this.#truncateJSStack(this.#lockedJsStackDepth.pop() || 0, endTime);\n }\n\n /**\n * Builds the initial calls with no duration from samples. Their\n * purpose is to be merged with the trace event array being parsed so\n * that they can be traversed in order with them and their duration\n * can be updated as the SampleIntegrator callbacks are invoked.\n */\n callsFromProfileSamples(): Types.Events.SyntheticProfileCall[] {\n const samples = this.#profileModel.samples;\n const timestamps = this.#profileModel.timestamps;\n if (!samples) {\n return [];\n }\n const calls: Types.Events.SyntheticProfileCall[] = [];\n let prevNode;\n for (let i = 0; i < samples.length; i++) {\n const node = this.#profileModel.nodeByIndex(i);\n const timestamp = milliToMicro(Types.Timing.Milli(timestamps[i]));\n if (!node) {\n continue;\n }\n const call = makeProfileCall(node, this.#profileId, i, timestamp, this.#processId, this.#threadId);\n calls.push(call);\n\n if (this.#engineConfig.debugMode) {\n const traceId = this.#profileModel.traceIds?.[i];\n this.jsSampleEvents.push(this.#makeJSSampleEvent(call, timestamp, traceId));\n }\n if (node.id === this.#profileModel.gcNode?.id && prevNode) {\n // GC samples have no stack, so we just put GC node on top of the\n // last recorded sample. Cache the previous sample for future\n // reference.\n this.#nodeForGC.set(call, prevNode);\n continue;\n }\n prevNode = node;\n }\n return calls;\n }\n\n /**\n * Given a synthetic profile call, returns an array of profile calls\n * representing the stack trace that profile call belongs to based on\n * its nodeId. The input profile call will be at the top of the\n * returned stack (last position), meaning that any other frames that\n * were effectively above it are omitted.\n * @param profileCall\n * @param overrideTimeStamp a custom timestamp to use for the returned\n * profile calls. If not defined, the timestamp of the input\n * profileCall is used instead. This param is useful for example when\n * creating the profile calls for a sample with a trace id, since the\n * timestamp of the corresponding trace event should be used instead\n * of the sample's.\n */\n\n #makeProfileCallsForStack(profileCall: Types.Events.SyntheticProfileCall, overrideTimeStamp?: Types.Timing.Micro):\n Types.Events.SyntheticProfileCall[] {\n let node = this.#profileModel.nodeById(profileCall.nodeId);\n const isGarbageCollection = node?.id === this.#profileModel.gcNode?.id;\n if (isGarbageCollection) {\n // Because GC don't have a stack, we use the stack of the previous\n // sample.\n node = this.#nodeForGC.get(profileCall) || null;\n }\n if (!node) {\n return [];\n }\n // `node.depth` is 0 based, so to set the size of the array we need\n // to add 1 to its value.\n const callFrames = new Array<Types.Events.SyntheticProfileCall>(node.depth + 1 + Number(isGarbageCollection));\n // Add the stack trace in reverse order (bottom first).\n let i = callFrames.length - 1;\n if (isGarbageCollection) {\n // Place the garbage collection call frame on top of the stack.\n callFrames[i--] = profileCall;\n }\n\n // Many of these ProfileCalls will be GC'd later when we estimate the frame\n // durations\n while (node) {\n callFrames[i--] = makeProfileCall(\n node, profileCall.profileId, profileCall.sampleIndex, overrideTimeStamp ?? profileCall.ts, this.#processId,\n this.#threadId);\n node = node.parent;\n }\n return callFrames;\n }\n\n #getStackForSampleTraceId(traceId: number, timestamp: Types.Timing.Micro): Types.Events.SyntheticProfileCall[]|null {\n const nodeId = this.#profileModel.traceIds?.[traceId];\n const node = nodeId && this.#profileModel.nodeById(nodeId);\n const maybeCallForTraceId =\n node && makeProfileCall(node, this.#profileId, -1, timestamp, this.#processId, this.#threadId);\n if (!maybeCallForTraceId) {\n return null;\n }\n if (this.#engineConfig.debugMode) {\n this.jsSampleEvents.push(this.#makeJSSampleEvent(maybeCallForTraceId, timestamp, traceId));\n }\n return this.#makeProfileCallsForStack(maybeCallForTraceId);\n }\n /**\n * Update tracked stack using this event's call stack.\n */\n #extractStackTrace(event: Types.Events.Event): void {\n let stackTrace = this.#currentJSStack;\n if (Types.Events.isProfileCall(event)) {\n stackTrace = this.#makeProfileCallsForStack(event);\n }\n const traceId = extractSampleTraceId(event);\n const maybeCallForTraceId = traceId && this.#getStackForSampleTraceId(traceId, event.ts);\n if (maybeCallForTraceId) {\n stackTrace = maybeCallForTraceId;\n }\n\n SamplesIntegrator.filterStackFrames(stackTrace, this.#engineConfig);\n\n const endTime = event.ts + (event.dur || 0);\n const minFrames = Math.min(stackTrace.length, this.#currentJSStack.length);\n let i;\n // Merge a sample's stack frames with the stack frames we have\n // so far if we detect they are equivalent.\n // Graphically\n // This:\n // Current stack trace Sample\n // [-------A------] [A]\n // [-------B------] [B]\n // [-------C------] [C]\n // ^ t = x1 ^ t = x2\n\n // Becomes this:\n // New stack trace after merge\n // [--------A-------]\n // [--------B-------]\n // [--------C-------]\n // ^ t = x2\n for (i = this.#lockedJsStackDepth.at(-1) || 0; i < minFrames; ++i) {\n const newFrame = stackTrace[i].callFrame;\n const oldFrame = this.#currentJSStack[i].callFrame;\n if (!SamplesIntegrator.framesAreEqual(newFrame, oldFrame)) {\n break;\n }\n // Scoot the right edge of this callFrame to the right\n this.#currentJSStack[i].dur =\n Types.Timing.Micro(Math.max(this.#currentJSStack[i].dur || 0, endTime - this.#currentJSStack[i].ts));\n }\n\n // If there are call frames in the sample that differ with the stack\n // we have, update the stack, but keeping the common frames in place\n // Graphically\n // This:\n // Current stack trace Sample\n // [-------A------] [A]\n // [-------B------] [B]\n // [-------C------] [C]\n // [-------D------] [E]\n // ^ t = x1 ^ t = x2\n // Becomes this:\n // New stack trace after merge\n // [--------A-------]\n // [--------B-------]\n // [--------C-------]\n // [E]\n // ^ t = x2\n this.#truncateJSStack(i, event.ts);\n\n for (; i < stackTrace.length; ++i) {\n const call = stackTrace[i];\n if (call.nodeId === this.#profileModel.programNode?.id || call.nodeId === this.#profileModel.root?.id ||\n call.nodeId === this.#profileModel.idleNode?.id || call.nodeId === this.#profileModel.gcNode?.id) {\n // Skip (root), (program) and (idle) frames, since this are not\n // relevant for web profiling and we don't want to show them in\n // the timeline.\n continue;\n }\n this.#currentJSStack.push(call);\n this.#constructedProfileCalls.push(call);\n }\n }\n\n /**\n * When a call stack that differs from the one we are tracking has\n * been detected in the samples, the latter is \"truncated\" by\n * setting the ending time of its call frames and removing the top\n * call frames that aren't shared with the new call stack. This way,\n * we can update the tracked stack with the new call frames on top.\n * @param depth the amount of call frames from bottom to top that\n * should be kept in the tracking stack trace. AKA amount of shared\n * call frames between two stacks.\n * @param time the new end of the call frames in the stack.\n */\n #truncateJSStack(depth: number, time: Types.Timing.Micro): void {\n if (this.#lockedJsStackDepth.length) {\n const lockedDepth = this.#lockedJsStackDepth.at(-1);\n if (lockedDepth && depth < lockedDepth) {\n console.error(`Child stack is shallower (${depth}) than the parent stack (${lockedDepth}) at ${time}`);\n depth = lockedDepth;\n }\n }\n if (this.#currentJSStack.length < depth) {\n console.error(`Trying to truncate higher than the current stack size at ${time}`);\n depth = this.#currentJSStack.length;\n }\n for (let k = 0; k < this.#currentJSStack.length; ++k) {\n this.#currentJSStack[k].dur = Types.Timing.Micro(Math.max(time - this.#currentJSStack[k].ts, 0));\n }\n this.#currentJSStack.length = depth;\n }\n\n #makeJSSampleEvent(call: Types.Events.SyntheticProfileCall, timestamp: Types.Timing.Micro, traceId?: number):\n Types.Events.SyntheticJSSample {\n const JSSampleEvent: Types.Events.SyntheticJSSample = {\n name: Types.Events.Name.JS_SAMPLE,\n cat: 'devtools.timeline',\n args: {\n data: {traceId, stackTrace: this.#makeProfileCallsForStack(call).map(e => e.callFrame)},\n },\n ph: Types.Events.Phase.INSTANT,\n ts: timestamp,\n dur: Types.Timing.Micro(0),\n pid: this.#processId,\n tid: this.#threadId,\n };\n return JSSampleEvent;\n }\n\n static framesAreEqual(frame1: Protocol.Runtime.CallFrame, frame2: Protocol.Runtime.CallFrame): boolean {\n return frame1.scriptId === frame2.scriptId && frame1.functionName === frame2.functionName &&\n frame1.lineNumber === frame2.lineNumber;\n }\n\n static showNativeName(name: string, runtimeCallStatsEnabled: boolean): boolean {\n return runtimeCallStatsEnabled && Boolean(SamplesIntegrator.nativeGroup(name));\n }\n\n static nativeGroup(nativeName: string): SamplesIntegrator.NativeGroups|null {\n if (nativeName.startsWith('Parse')) {\n return SamplesIntegrator.NativeGroups.PARSE;\n }\n if (nativeName.startsWith('Compile') || nativeName.startsWith('Recompile')) {\n return SamplesIntegrator.NativeGroups.COMPILE;\n }\n return null;\n }\n\n static isNativeRuntimeFrame(frame: Protocol.Runtime.CallFrame): boolean {\n return frame.url === 'native V8Runtime';\n }\n\n static filterStackFrames(stack: Types.Events.SyntheticProfileCall[], engineConfig: Types.Configuration.Configuration):\n void {\n const showAllEvents = engineConfig.showAllEvents;\n if (showAllEvents) {\n return;\n }\n let previousNativeFrameName: string|null = null;\n let j = 0;\n for (let i = 0; i < stack.length; ++i) {\n const frame = stack[i].callFrame;\n const nativeRuntimeFrame = SamplesIntegrator.isNativeRuntimeFrame(frame);\n if (nativeRuntimeFrame &&\n !SamplesIntegrator.showNativeName(frame.functionName, engineConfig.includeRuntimeCallStats)) {\n continue;\n }\n const nativeFrameName = nativeRuntimeFrame ? SamplesIntegrator.nativeGroup(frame.functionName) : null;\n if (previousNativeFrameName && previousNativeFrameName === nativeFrameName) {\n continue;\n }\n previousNativeFrameName = nativeFrameName;\n stack[j++] = stack[i];\n }\n stack.length = j;\n }\n\n static createFakeTraceFromCpuProfile(profile: Protocol.Profiler.Profile, tid: Types.Events.ThreadID):\n Types.File.TraceFile {\n if (!profile) {\n return {traceEvents: [], metadata: {}};\n }\n // The |Name.CPU_PROFILE| will let MetaHandler to set |traceIsGeneric| to false\n // The start time and duration is important here because we'll use them to determine the traceBounds\n // We use the start and end time of the profile (which is longer than all samples), so the Performance\n // panel won't truncate this time period.\n const cpuProfileEvent: Types.Events.SyntheticCpuProfile = {\n cat: 'disabled-by-default-devtools.timeline',\n name: Types.Events.Name.CPU_PROFILE,\n ph: Types.Events.Phase.COMPLETE,\n pid: Types.Events.ProcessID(1),\n tid,\n ts: Types.Timing.Micro(profile.startTime),\n dur: Types.Timing.Micro(profile.endTime - profile.startTime),\n args: {data: {cpuProfile: profile}},\n // Create an arbitrary profile id.\n id: '0x1' as Types.Events.ProfileID,\n };\n\n return {\n traceEvents: [cpuProfileEvent],\n metadata: {\n dataOrigin: Types.File.DataOrigin.CPU_PROFILE,\n }\n };\n }\n\n static extractCpuProfileFromFakeTrace(traceEvents: readonly Types.Events.Event[]): Protocol.Profiler.Profile {\n const profileEvent = traceEvents.find(e => Types.Events.isSyntheticCpuProfile(e));\n const profile = profileEvent?.args.data.cpuProfile;\n if (!profile) {\n throw new Error('Missing cpuProfile data');\n }\n return profile;\n }\n}\n\nexport namespace SamplesIntegrator {\n export enum NativeGroups {\n COMPILE = 'Compile',\n PARSE = 'Parse',\n }\n}\n"]} |