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[benchmarks-js.git] / benchmark-utils.js

diff --git a/benchmark-utils.js b/benchmark-utils.js
index 841cef87a6a9bc32bac9fa2bd161b76870050e3f..678a2b3b80ae28a7367ade71a1993ee77b45d640 100644 (file)
--- a/benchmark-utils.js
+++ b/benchmark-utils.js
@@ -12,13 +12,14 @@ function secureRandom () {
 /**
  * @param max
  * @param min
+ * @returns
  */
-function generateRandomInteger (max, min = 0) {
+function generateRandomInteger (max = Number.MAX_SAFE_INTEGER, min = 0) {
   if (max < 0) {
     throw new RangeError('Invalid interval')
   }
   max = Math.floor(max)
-  if (min) {
+  if (min != null && min !== 0) {
     if (max < min || min < 0) {
       throw new RangeError('Invalid interval')
     }
@@ -28,8 +29,44 @@ function generateRandomInteger (max, min = 0) {
   return Math.floor(secureRandom() * (max + 1))
 }
 
+/**
+ *
+ * @param size
+ * @param max
+ * @param numberGenerator
+ * @returns
+ */
+function generateRandomNumberArray (
+  size,
+  max = Number.MAX_VALUE,
+  numberGenerator = generateRandomFloat
+) {
+  const array = []
+  for (let i = 0; i < size; i++) {
+    array.push(numberGenerator(max))
+  }
+  return array
+}
+
+/**
+ *
+ * @param max
+ * @param min
+ * @param negative
+ * @returns
+ */
+function generateRandomFloat (max = Number.MAX_VALUE, min = 0, negative = true) {
+  if (max < min || min < 0 || max < 0) {
+    throw new RangeError('Invalid interval')
+  }
+  const randomPositiveFloat = crypto.randomBytes(4).readUInt32LE() / 0xffffffff
+  const sign = negative && randomPositiveFloat < 0.5 ? -1 : 1
+  return sign * (randomPositiveFloat * (max - min) + min)
+}
+
 /**
  * @param ms
+ * @returns
  */
 async function sleep (ms) {
   return new Promise(resolve => setTimeout(resolve, ms))
@@ -40,4 +77,11 @@ const LIST_FORMATTER = new Intl.ListFormat('en-US', {
   type: 'conjunction'
 })
 
-module.exports = { generateRandomInteger, sleep, secureRandom, LIST_FORMATTER }
+module.exports = {
+  generateRandomInteger,
+  generateRandomFloat,
+  generateRandomNumberArray,
+  sleep,
+  secureRandom,
+  LIST_FORMATTER
+}