generate-password - npm Package Compare versions

Comparing version 1.4.1 to 1.4.2

CHANGELOG.md

@@ -0,1 +1,7 @@
+# 1.4.2 / 2019-6-16
+Includes a performance improvement in the random number generator.
+
+#### Notable Changes
+- [`ea642553c`](https://github.com/brendanashworth/generate-password/commit/ea642553c5ba327989f36d0b0f2d4e80ff25b45a) - Optimized fetch of random values using cache (Sebastien ROBERT)
+
 # 1.4.1 / 2018-10-28
@@ -2,0 +8,0 @@ Bug fix to `randomNumber()` function that reduced entropy, resulting in a bias towards letters, generally.

package.json

 {
   "name": "generate-password",
-  "version": "1.4.1",
+  "version": "1.4.2",
   "description": "Easy library for generating unique passwords.",
@@ -5,0 +5,0 @@ "main": "main.js",

src/generate.js

@@ -5,8 +5,25 @@ var crypto = require('crypto');
 
+const RANDOM_BATCH_SIZE = 256;
+
+var randomIndex;
+var randomBytes;
+
+var getNextRandomValue = function() {
+	if (randomIndex === undefined || randomIndex >= randomBytes.length) {
+		randomIndex = 0;
+		randomBytes = crypto.randomBytes(RANDOM_BATCH_SIZE);
+	}
+
+	var result = randomBytes[randomIndex];
+	randomIndex += 1;
+
+	return result;
+};
+
 // Generates a random number
 var randomNumber = function(max) {
 	// gives a number between 0 (inclusive) and max (exclusive)
-	var rand = crypto.randomBytes(1)[0];
+	var rand = getNextRandomValue();
 	while (rand >= 256 - (256 % max)) {
-		rand = crypto.randomBytes(1)[0];
+		rand = getNextRandomValue();
 	}
@@ -13,0 +30,0 @@ return rand % max;

No alert changes

Improved metrics

Total package byte prevSize

17278

increased by3.37%

Lines of code

238

increased by5.31%

Worsened metrics

Number of package files

12

decreased by-7.69%

No dependency changes