Improve Windows performance (#21)

Fixes #20

Author: MarkTiedemann

fastlist.exe

@@ -1,21 +1,25 @@
 'use strict';
 const path = require('path');
 const childProcess = require('child_process');
-const tasklist = require('tasklist');
 const pify = require('pify');
 
 const TEN_MEGABYTES = 1000 * 1000 * 10;
 
 function win() {
-	return tasklist().then(data => {
-		return data.map(x => {
-			return {
-				pid: x.pid,
-				name: x.imageName,
-				cmd: x.imageName
-			};
-		});
-	});
+	// Source: https://github.com/MarkTiedemann/fastlist
+	const bin = path.join(__dirname, 'fastlist.exe');
+
+	return pify(childProcess.execFile)(bin, {maxBuffer: TEN_MEGABYTES})
+		.then(stdout =>
+			stdout.trim()
+				.split('\r\n')
+				.map(line => line.split('\t'))
+				.map(([name, pid, ppid]) => ({
+					name,
+					pid: Number.parseInt(pid, 10),
+					ppid: Number.parseInt(ppid, 10)
+				}))
+		);
 }
 
 function def(options = {}) {

index.js

@@ -28,8 +28,7 @@
 		"tasklist"
 	],
 	"dependencies": {
-		"pify": "^3.0.0",
-		"tasklist": "^3.1.0"
+		"pify": "^4.0.0"
 	},
 	"devDependencies": {
 		"ava": "*",

package.json

@@ -23,7 +23,7 @@ const psList = require('ps-list');
 })();
 ```
 
-> The `cpu`, `memory`, and `ppid` properties are not supported on Windows.
+> The `cmd`, `cpu`, and `memory` properties are not supported on Windows.
 
 
 ## API

readme.md

@@ -12,19 +12,17 @@ test('main', async t => {
 		list.every(x =>
 			typeof x.pid === 'number' &&
 			typeof x.name === 'string' &&
-			typeof x.cmd === 'string'
+			typeof x.ppid === 'number'
 		)
 	);
 
 	if (!isWindows) {
 		t.true(
 			list.every(x =>
+				typeof x.cmd === 'string' &&
 				typeof x.cpu === 'number' &&
 				typeof x.memory === 'number'
 			)
 		);
-		t.true(
-			list.every(x => typeof x.ppid === 'number')
-		);
 	}
 });