Documentation | Updated JMH Section in README (#7)

README.md

@@ -70,10 +70,22 @@ behaviour that is commonly used across multiple days.
 -Design Patterns
 
 ### Testing
--Junit5 / AssertK \
--JMH? \
--TDD \
--VisualVM Sampling/Profiling
+
+#### JMH (Java Micro-Benchmarking Harness)
+Due to the nature of the puzzle inputs, lots of the second parts scaled the input size significantly.
+The shear size of these inputs made the solutions impossible to brute-force or to even wait for with a runtime
+complexity of O(1). I used [VisualVM](#visualvm-sampling--profiling) to manually investigate crippling performance
+issues, but I wanted an automated solution to run across the whole codebase.
+
+From the [OpenJDK](https://openjdk.java.net/projects/code-tools/jmh/) website;
+
+    JMH is a Java harness for building, running, and analysing nano/micro/milli/macro benchmarks
+    written in Java and other languages targeting the JVM.
+
+
+#### Junit5 & AssertK
+#### Test-Driven Development
+#### VisualVM Sampling & Profiling
 
 ## The Days
 ### Most Challenging (Day 18)