Author. Java Champion. Writer of blogs. Creator of the OSS Java library Eclipse Collections. Inspired by Smalltalk. Opinions are my own.
Author of "Eclipse Collections Categorically: Level up your programming game"
| Blog | https://donraab.medium.com/ |
| Github | https://github.com/donraab |
| Bluesky | @thedonraab.bsky.social |
| Eclipse Collections | https://github.com/eclipse-collections/eclipse-collections |
I've been writing about better building blocks in #Java. Several blogs since March 2026 including:
• Empty should be empty
• Lazy & eager performance
• Memory costs for lazy iteration
• Intention Revealing Names
• Collecting Collectors
• "Fat-free" Lambdas
• Snow Leopards & Tribbles
Stories to inspire, including the blog linked below from March 2025. 🙏
https://donraab.medium.com/building-better-building-blocks-7e61dc71d519?source=friends_link&sk=a2c8fab54004249e705f190e83422b2f
I've been writing about better building blocks in #Java. Several blogs since March 2026 including:
• Empty should be empty
• Lazy & eager performance
• Memory costs for lazy iteration
• Intention Revealing Names
• Collecting Collectors
• "Fat-free" Lambdas
• Snow Leopards & Tribbles
Stories to inspire, including the blog linked below from March 2025. 🙏
https://donraab.medium.com/building-better-building-blocks-7e61dc71d519?source=friends_link&sk=a2c8fab54004249e705f190e83422b2f
Seen on a heap.
String: 3.4 million instances
byte[]: 3.7 million instances
Stream: Hold my 🍺
MatchOps: Hold my 🍺🍺🍺
Shocked I was able to see so many ReferencePipeline$Head (Stream) and MatchOps inner class instances in a jmap heap histogram. Created and gone in a few blinks of an eye.
Cheers to the amazing developers who make object allocation blazingly fast and to the developers who build the world class Java garbage collectors. Thank you! 🍺🍺🍺
"Saving the planet, one Collector at a time."
I can't un-new the billions of Collector instances that were created since 2014, but I can share ideas and alternatives for the future. Thanks for reading! 🙏
#Java #EclipseCollections
https://donraab.medium.com/counting-and-collecting-collectors-d69b7c9aaca0?source=friends_link&sk=ef73f56026d1afcf97e869f8ae990ea9
