perf: refactored structureOutput with single reduce (#592)

CHANGELOG.md

@@ -11,6 +11,8 @@ project adheres to [Semantic Versioning](http://semver.org/).
 
 ### Changed
 
+- remove unnecessary loop from `osMemoryHeapLinux`
+
 ### Added
 
 ## [15.0.0] - 2023-10-09

lib/metrics/osMemoryHeapLinux.js

@@ -10,25 +10,24 @@ const PROCESS_VIRTUAL_MEMORY = 'process_virtual_memory_bytes';
 const PROCESS_HEAP = 'process_heap_bytes';
 
 function structureOutput(input) {
-	const returnValue = {};
+	return input.split('\n').reduce((acc, string) => {
+		if (!values.some(value => string.startsWith(value))) {
+			return acc;
+		}
 
-	input
-		.split('\n')
-		.filter(s => values.some(value => s.indexOf(value) === 0))
-		.forEach(string => {
-			const split = string.split(':');
+		const split = string.split(':');
 
-			// Get the value
-			let value = split[1].trim();
-			// Remove trailing ` kb`
-			value = value.substr(0, value.length - 3);
-			// Make it into a number in bytes bytes
-			value = Number(value) * 1024;
+		// Get the value
+		let value = split[1].trim();
+		// Remove trailing ` kb`
+		value = value.substr(0, value.length - 3);
+		// Make it into a number in bytes bytes
+		value = Number(value) * 1024;
 
-			returnValue[split[0]] = value;
-		});
+		acc[split[0]] = value;
 
-	return returnValue;
+		return acc;
+	}, {});
 }
 
 module.exports = (registry, config = {}) => {