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const execa = require('execa'); | |
const delay = require('delay'); | |
const CDP = require('chrome-remote-interface'); | |
async function trace(port) { | |
const client = await CDP({port}); | |
if (!client.NodeTracing) { | |
console.error( | |
`The implementation doesn't support NodeTracing domain. Closing.`); | |
client.close(); | |
return; | |
} | |
const cats = await client.NodeTracing.getCategories(); | |
console.log('supported categories:'); | |
for (const c of cats.categories) { | |
console.log(' ', c); | |
} | |
// Events are emitted only after the timeout expires below (currently 5 sec). | |
client.on('event', (message) => { | |
console.log('event:', message.method); | |
if (message && message.data && message.data.value) { | |
for (const value of message.data.value) { | |
console.log(value); | |
} | |
} | |
}); | |
client.NodeTracing.tracingComplete(() => { | |
client.close(); | |
}); | |
const result = await client.NodeTracing.start({ | |
traceConfig: { | |
recordMode: 'recordContinuously', | |
includedCategories: ['node'], | |
}, | |
}); | |
console.log('start result', result); | |
setTimeout(() => { | |
console.log('stoping tracing'); | |
client.NodeTracing.stop(); | |
}, 5000).unref(); | |
} | |
async function main() { | |
execa(process.execPath, ['--inspect', '-e', 'setTimeout(_=>_, 5000)']) | |
.stdout.pipe(process.stdout); | |
await delay(100); | |
trace(9229); | |
await delay(5000); | |
} | |
main().catch(console.error); |
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