From 5403a76a7c09cfde18dbbdd10ceb1b6a7b4dd3da Mon Sep 17 00:00:00 2001
From: atomiks <cc.glows@gmail.com>
Date: Wed, 11 Apr 2018 23:39:49 +1000
Subject: [PATCH 1/4] Create hz.md

---
 snippets/hz.md | 34 ++++++++++++++++++++++++++++++++++
 1 file changed, 34 insertions(+)
 create mode 100644 snippets/hz.md

diff --git a/snippets/hz.md b/snippets/hz.md
new file mode 100644
index 000000000..b05f18af6
--- /dev/null
+++ b/snippets/hz.md
@@ -0,0 +1,34 @@
+### hz
+
+Returns the number of times a function executed per second. 
+`hz` is the unit for `hertz`, the unit of frequency defined as one cycle per second.
+
+Use `window.performance.now()` before and after the iteration loop to get the difference in milliseconds
+to calculate the time elapsed executing the function `iterations` times,
+using math to calculate the number of iterations per second. 
+Omit the second argument, `iterations`, to use the default of 100 iterations.
+
+```js
+const hz = (fn, iterations = 100) => {
+  const before = performance.now();
+  for (let i = 0; i < iterations; i++) fn();
+  return 1000 * iterations / (performance.now() - before);
+};
+```
+
+```js
+// 10,000 element array
+const numbers = Array(10000).fill().map((_, i) => i);
+
+// Test functions with the same goal: sum up the elements in the array
+const sumReduce = () => numbers.reduce((acc, n) => acc + n, 0);
+const sumForLoop = () => {
+  let sum = 0
+  for (let i = 0; i < numbers.length; i++) sum += numbers[i]
+  return sum
+};
+
+// `sumForLoop` is nearly 10 times faster
+Math.round(hz(sumReduce)); // 572
+Math.round(hz(sumForLoop)); // 4784
+```

From 632c565431d8e1132751efc7d4c92815314297e8 Mon Sep 17 00:00:00 2001
From: atomiks <cc.glows@gmail.com>
Date: Wed, 11 Apr 2018 23:41:22 +1000
Subject: [PATCH 2/4] Update tag_database

---
 tag_database | 1 +
 1 file changed, 1 insertion(+)

diff --git a/tag_database b/tag_database
index 24cf93bef..f086f5c62 100644
--- a/tag_database
+++ b/tag_database
@@ -103,6 +103,7 @@ hide:browser,css
 httpGet:utility,url,browser
 httpPost:utility,url,browser
 httpsRedirect:browser,url
+hz:function
 indexOfAll:array
 initial:array
 initialize2DArray:array

From 48b5a747668065719ee57c637de493d016bcf55d Mon Sep 17 00:00:00 2001
From: atomiks <cc.glows@gmail.com>
Date: Thu, 12 Apr 2018 15:26:07 +1000
Subject: [PATCH 3/4] Update hz.md

---
 snippets/hz.md | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/snippets/hz.md b/snippets/hz.md
index b05f18af6..1487b9b46 100644
--- a/snippets/hz.md
+++ b/snippets/hz.md
@@ -3,10 +3,7 @@
 Returns the number of times a function executed per second. 
 `hz` is the unit for `hertz`, the unit of frequency defined as one cycle per second.
 
-Use `window.performance.now()` before and after the iteration loop to get the difference in milliseconds
-to calculate the time elapsed executing the function `iterations` times,
-using math to calculate the number of iterations per second. 
-Omit the second argument, `iterations`, to use the default of 100 iterations.
+Use `window.performance.now()` to get the difference in milliseconds before and after the iteration loop to calculate the time elapsed executing the function `iterations` times. Return the number of cycles per second by converting milliseconds to seconds and dividing it by the time elapsed. Omit the second argument, `iterations`, to use the default of 100 iterations.
 
 ```js
 const hz = (fn, iterations = 100) => {

From 503e74c8c6258598f700e27d5d10cd75d4cb1d97 Mon Sep 17 00:00:00 2001
From: Angelos Chalaris <chalarangelo@gmail.com>
Date: Thu, 12 Apr 2018 21:42:34 +0300
Subject: [PATCH 4/4] Update hz.md

---
 snippets/hz.md | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/snippets/hz.md b/snippets/hz.md
index 1487b9b46..a9848fb55 100644
--- a/snippets/hz.md
+++ b/snippets/hz.md
@@ -3,7 +3,9 @@
 Returns the number of times a function executed per second. 
 `hz` is the unit for `hertz`, the unit of frequency defined as one cycle per second.
 
-Use `window.performance.now()` to get the difference in milliseconds before and after the iteration loop to calculate the time elapsed executing the function `iterations` times. Return the number of cycles per second by converting milliseconds to seconds and dividing it by the time elapsed. Omit the second argument, `iterations`, to use the default of 100 iterations.
+Use `performance.now()` to get the difference in milliseconds before and after the iteration loop to calculate the time elapsed executing the function `iterations` times. 
+Return the number of cycles per second by converting milliseconds to seconds and dividing it by the time elapsed. 
+Omit the second argument, `iterations`, to use the default of 100 iterations.
 
 ```js
 const hz = (fn, iterations = 100) => {