From 2594a89c3db9e469ad42bc2d94ba21e3603cfc15 Mon Sep 17 00:00:00 2001
From: jbranchaud <jbranchaud@gmail.com>
Date: Tue, 26 Jan 2021 15:58:37 -0600
Subject: [PATCH] Add IRB Has Built-In Benchmarking With Ruby 3 as a ruby til

---
 README.md                                     |  3 ++-
 ...b-has-built-in-benchmarking-with-ruby-3.md | 26 +++++++++++++++++++
 2 files changed, 28 insertions(+), 1 deletion(-)
 create mode 100644 ruby/irb-has-built-in-benchmarking-with-ruby-3.md

diff --git a/README.md b/README.md
index 7d60cd7..ddf8700 100644
--- a/README.md
+++ b/README.md
@@ -10,7 +10,7 @@ pairing with smart people at Hashrocket.
 
 For a steady stream of TILs, [sign up for my newsletter](https://tinyletter.com/jbranchaud).
 
-_1025 TILs and counting..._
+_1026 TILs and counting..._
 
 ---
 
@@ -835,6 +835,7 @@ _1025 TILs and counting..._
 - [Iterate With An Offset Index](ruby/iterate-with-an-offset-index.md)
 - [Ins And Outs Of Pry](ruby/ins-and-outs-of-pry.md)
 - [Invoking Rake Tasks Multiple Times](ruby/invoking-rake-tasks-multiple-times.md)
+- [IRB Has Built-In Benchmarking With Ruby 3](ruby/irb-has-built-in-benchmarking-with-ruby-3.md)
 - [Jump Out Of A Nested Context With Throw/Catch](ruby/jump-out-of-a-nested-context-with-throw-catch.md)
 - [Last Raised Exception In The Call Stack](ruby/last-raised-exception-in-the-call-stack.md)
 - [Limit Split](ruby/limit-split.md)
diff --git a/ruby/irb-has-built-in-benchmarking-with-ruby-3.md b/ruby/irb-has-built-in-benchmarking-with-ruby-3.md
new file mode 100644
index 0000000..4963e2b
--- /dev/null
+++ b/ruby/irb-has-built-in-benchmarking-with-ruby-3.md
@@ -0,0 +1,26 @@
+# IRB Has Built-In Benchmarking With Ruby 3
+
+As of Ruby 3.0.0, `irb`—Ruby's interactive console—comes with a `measure`
+method. This can be used to turn the processing time feature on and off. With
+it on, you can do rough benchmarking of how long different process take.
+
+Ruby `measure` or `measure(true)` to turn on the timing feature.
+
+```ruby
+> measure
+TIME is added.
+=> nil
+```
+
+Once it is enabled, any command you run will including processing time details:
+
+```ruby
+> array = [1,2,3,4]
+processing time: 0.000033s
+=> [1, 2, 3, 4]
+> array.zip(array).map { |a,b| a * b ** (a * b) }
+processing time: 0.000057s
+=> [1, 32, 59049, 17179869184]
+```
+
+[source](https://jemma.dev/blog/irb-measure)