@oaklean/profiler-core
Version:
Part of the @oaklean suite. It provides all basic functions to work with the `.oak` file format. It allows parsing the `.oak` file format as well as tools for analyzing the measurement values. It also provides all necessary capabilities required for prec
186 lines • 15.3 kB
JavaScript
;
/*---------------------------------------------------------
* Copyright (C) Microsoft Corporation. All rights reserved.
*--------------------------------------------------------*/
Object.defineProperty(exports, "__esModule", { value: true });
exports.buildModel = void 0;
const model_1 = require("../common/model");
const getBestLocation_1 = require("../getBestLocation");
const path_1 = require("../path");
/**
* Recursive function that computes and caches the aggregate time for the
* children of the computed now.
*/
const computeAggregateTime = (index, nodes) => {
const row = nodes[index];
if (row.aggregateTime) {
return row.aggregateTime;
}
let total = row.selfTime;
for (const child of row.children) {
total += computeAggregateTime(child, nodes);
}
return (row.aggregateTime = total);
};
/**
* Ensures that all profile nodes have a location ID, setting them if they
* aren't provided by default.
*/
const ensureSourceLocations = (profile) => {
var _a;
if (profile.$vscode) {
return profile.$vscode.locations; // profiles we generate are already good
}
let locationIdCounter = 0;
const locationsByRef = new Map();
const getLocationIdFor = (callFrame) => {
const ref = [
callFrame.functionName,
callFrame.url,
callFrame.scriptId,
callFrame.lineNumber,
callFrame.columnNumber
].join(':');
const existing = locationsByRef.get(ref);
if (existing) {
return existing.id;
}
const id = locationIdCounter++;
locationsByRef.set(ref, {
id,
callFrame,
location: {
lineNumber: callFrame.lineNumber + 1,
columnNumber: callFrame.columnNumber + 1,
source: {
name: (0, path_1.maybeFileUrlToPath)(callFrame.url),
path: (0, path_1.maybeFileUrlToPath)(callFrame.url),
sourceReference: 0
}
}
});
return id;
};
for (const node of profile.nodes) {
node.locationId = getLocationIdFor(node.callFrame);
node.positionTicks = (_a = node.positionTicks) === null || _a === void 0 ? void 0 : _a.map((tick) => (Object.assign(Object.assign({}, tick), {
// weirdly, line numbers here are 1-based, not 0-based. The position tick
// only gives line-level granularity, so 'mark' the entire range of source
// code the tick refers to
startLocationId: getLocationIdFor(Object.assign(Object.assign({}, node.callFrame), { lineNumber: tick.line - 1, columnNumber: 0 })), endLocationId: getLocationIdFor(Object.assign(Object.assign({}, node.callFrame), { lineNumber: tick.line, columnNumber: 0 })) })));
}
return [...locationsByRef.values()]
.sort((a, b) => a.id - b.id)
.map((l) => ({ locations: [l.location], callFrame: l.callFrame }));
};
/**
* Computes the model for the given profile.
*/
const buildModel = (profile) => {
var _a, _b, _c;
if (!profile.timeDeltas || !profile.samples) {
return {
nodes: [],
locations: [],
samples: profile.samples || [],
timeDeltas: profile.timeDeltas || [],
rootPath: (_a = profile.$vscode) === null || _a === void 0 ? void 0 : _a.rootPath,
duration: profile.endTime - profile.startTime
};
}
const { samples } = profile;
const timeDeltas = [...profile.timeDeltas];
const sourceLocations = ensureSourceLocations(profile);
const locations = sourceLocations.map((l, id) => {
const src = (0, getBestLocation_1.getBestLocation)(profile, l.locations);
return {
id,
selfTime: 0,
aggregateTime: 0,
ticks: 0,
category: (0, model_1.categorize)(l.callFrame, src),
callFrame: Object.assign(Object.assign({}, l.callFrame), { scriptId: l.callFrame.scriptId.toString() }),
src
};
});
const idMap = new Map();
const mapId = (nodeId) => {
let id = idMap.get(nodeId);
if (id === undefined) {
id = idMap.size;
idMap.set(nodeId, id);
}
return id;
};
// 1. Created a sorted list of nodes. It seems that the profile always has
// incrementing IDs, although they are just not initially sorted.
const nodes = new Array(profile.nodes.length);
for (let i = 0; i < profile.nodes.length; i++) {
const node = profile.nodes[i];
// make them 0-based:
const id = mapId(node.id);
nodes[id] = {
id,
selfTime: 0,
aggregateTime: 0,
locationId: node.locationId,
children: ((_b = node.children) === null || _b === void 0 ? void 0 : _b.map(mapId)) || []
};
for (const child of node.positionTicks || []) {
if (child.startLocationId) {
locations[child.startLocationId].ticks += child.ticks;
}
}
}
for (const node of nodes) {
for (const child of node.children) {
nodes[child].parent = node.id;
}
}
// 2. The profile samples are the 'bottom-most' node, the currently running
// code. Sum of these in the self time.
const duration = profile.endTime - profile.startTime;
let lastNodeTime = duration - timeDeltas[0];
for (let i = 0; i < timeDeltas.length - 1; i++) {
const d = timeDeltas[i + 1];
nodes[mapId(samples[i])].selfTime += d;
lastNodeTime -= d;
}
// Add in an extra time delta for the last sample. `timeDeltas[0]` is the
// time before the first sample, and the time of the last sample is only
// derived (approximately) by the missing time in the sum of deltas. Save
// some work by calculating it here.
if (nodes.length) {
nodes[mapId(samples[timeDeltas.length - 1])].selfTime += lastNodeTime;
timeDeltas.push(lastNodeTime);
}
// 3. Add the aggregate times for all node children and locations
const calcAggregatedTimeOfLocations = (node, visited) => {
const location = locations[node.locationId];
let selfAdded = false;
if (!visited.has(node.locationId)) {
// node is not an ancestor of a node with the same location
visited.add(node.locationId);
selfAdded = true;
location.aggregateTime += computeAggregateTime(node.id, nodes);
}
location.selfTime += node.selfTime;
for (const child of node.children) {
calcAggregatedTimeOfLocations(nodes[child], visited);
}
if (selfAdded) {
visited.delete(node.locationId);
}
};
calcAggregatedTimeOfLocations(nodes[0], new Set());
return {
nodes,
locations,
samples: samples.map(mapId),
timeDeltas,
rootPath: (_c = profile.$vscode) === null || _c === void 0 ? void 0 : _c.rootPath,
duration
};
};
exports.buildModel = buildModel;
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