0xc1a35
cl4es.bsky.social
0xc1a35
@cl4es.bsky.social
Work: OpenJDK/Java performance; https://github.com/cl4es
@pminborg.bsky.social and I wrote a bit about some of the many performance improvements in JDK 25: inside.java/2025/10/20/j...

tl;dr: upgrade to JDK 25 and add -XX:+UseCompactObjectHeaders
Performance Improvements in JDK 25
Java is constantly evolving with ever increasing performance. JDK 25 comes with significant performance improvements compared to previous versions including scoped values, improved GCs, lots of compil...
inside.java
October 20, 2025 at 9:27 AM
Going to be doing some on-and-off between work and parental leave in the coming months. A good time to pick up a book or two and do some gardening, maybe. Or I'll just be trying to find time for naps. We'll see!
March 27, 2025 at 2:15 PM
Reposted by 0xc1a35
Have you noticed he never says anything bad about actual tyrannical governments?
January 6, 2025 at 8:53 AM
Having a surprisingly good time playing Satisfactory.

Could probably swoop around and adding nice little catwalks to my factory for days. No progress. Only vibes.
January 3, 2025 at 10:31 PM
Getting there..
November 23, 2024 at 2:47 PM
Hi, I'm Claes.

I grew tired of that other place, too.

I work mostly on the OpenJDK (github.com/cl4es). Sometimes I blog a bit about that (cl4es.github.io), though it's been a quiet lately because reasons.

Here to look for inspiration and engage with others.
November 18, 2024 at 8:45 AM