69 lines
2.0 KiB
JavaScript
69 lines
2.0 KiB
JavaScript
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"use strict";
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Object.defineProperty(exports, "__esModule", {
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value: true
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});
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exports.default = void 0;
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function _assert() {
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const data = _interopRequireDefault(require("assert"));
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_assert = function () {
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return data;
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};
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return data;
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}
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function _diagnostic() {
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const data = _interopRequireDefault(require("@parcel/diagnostic"));
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_diagnostic = function () {
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return data;
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};
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return data;
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}
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function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
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// https://chromedevtools.github.io/devtools-protocol/tot/Profiler#type-Profile
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// https://chromedevtools.github.io/devtools-protocol/tot/Profiler#type-ProfileNode
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// https://chromedevtools.github.io/devtools-protocol/tot/Runtime#type-CallFrame
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// https://chromedevtools.github.io/devtools-protocol/tot/Profiler#type-PositionTickInfo
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class SamplingProfiler {
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startProfiling() {
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let inspector;
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try {
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inspector = require('inspector');
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} catch (err) {
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throw new (_diagnostic().default)({
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diagnostic: {
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message: `The inspector module isn't available`,
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origin: '@parcel/workers',
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hints: ['Disable build profiling']
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}
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});
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}
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this.session = new inspector.Session();
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this.session.connect();
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return Promise.all([this.sendCommand('Profiler.setSamplingInterval', {
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interval: 100
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}), this.sendCommand('Profiler.enable'), this.sendCommand('Profiler.start')]);
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}
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sendCommand(method, params) {
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(0, _assert().default)(this.session != null);
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return new Promise((resolve, reject) => {
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this.session.post(method, params, (err, p) => {
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if (err == null) {
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resolve(p);
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} else {
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reject(err);
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}
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});
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});
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}
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destroy() {
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if (this.session != null) {
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this.session.disconnect();
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}
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}
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async stopProfiling() {
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let res = await this.sendCommand('Profiler.stop');
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this.destroy();
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return res.profile;
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}
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}
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exports.default = SamplingProfiler;
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