Created
November 19, 2019 13:55
-
-
Save CarsonMcKinstry/b5b96d64d99675020dc41480a16e69de to your computer and use it in GitHub Desktop.
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| import * as fs from "fs"; | |
| export function memoryUsageLog( | |
| file: string | Writable, | |
| sampleRate: number = 1, | |
| sampleTime: number = 60, | |
| debug: boolean = false, | |
| callback = () => {} | |
| ) { | |
| const output = typeof file === "string" ? fs.createWriteStream(file) : file; | |
| output.write("time, rss, head\n"); | |
| let rowCount = 0; | |
| setTimeout(() => { | |
| console.log("Sampling done"); | |
| callback(); | |
| process.exit(0); | |
| }, sampleTime * 1000); | |
| console.log("Sampling start with the following settings:"); | |
| console.log( | |
| `Sampling time: ${Math.floor(sampleTime / 60)}m${sampleTime % 60}s` | |
| ); | |
| console.log(`Sample Rate: ${sampleRate} per second`); | |
| console.log(`Log written to: ${file}`); | |
| setInterval(() => { | |
| rowCount++; | |
| var mem = process.memoryUsage(); | |
| var fmt = (v: number) => (v / (1024 * 1024)).toFixed(0) + "MB"; | |
| output.write(`${rowCount},${mem.rss}, ${mem.heapUsed}\n`); | |
| if (debug) { | |
| console.log("RSS = " + fmt(mem.rss), "Heap = " + fmt(mem.heapUsed)); | |
| } | |
| }, Math.floor(1000 / sampleRate)); | |
| } |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment