What Most Java Developers Miss About HashMap - And Why It Might Be Slowing You Down (4 min)🗺️
https://dev.to/mrkandreev/what-most-java-developers-miss-about-hashmap-and-why-it-might-be-slowing-you-down-2fe9

Java Strings Internals (10 min)⚙️
https://tanis.codes/posts/java-strings-internals/

Testing the untestable (2 min)🪨
https://blog.frankel.ch/testing-untestable/

The Cost of Not Knowing MongoDB – Part 2 (21 min)🍃
https://foojay.io/today/the-cost-of-not-knowing-mongodb-part-2-appv5r0-to-appv5r4/