Hacker News: davidtos

New comment by davidtos in "Ask HN: What are you working on? (March 2025)"

davidtos — Mon, 31 Mar 2025 07:06:07 +0000

I am still working on Java bindings for io_uring https://github.com/davidtos/JUring

The goal is to bring fast random read/writes to Java. Fun project with lots of great challenges around performance while maintaining a nice API.

Show HN: JUring – Java bindings for io_uring file I/O

davidtos — Mon, 13 Jan 2025 10:06:08 +0000

Hi HN! For the past few weeks, I've been working on bringing io_uring to Java. It started as an experiment, but slowly it became more than just that, and now trying to turn it into a proper library.

After hearing talks about virtual threads and io_urings performance I wanted to build something that was faster than Java provides out of the box.

I ended up creating two APIs: - A direct one that closely mirrors io_uring's behavior - A blocking one built with Virtual Threads in mind for remote files.

This is the link to the project if you are interested https://github.com/davidtos/JUring

It's still far from done, but it's running! Would love to hear your thoughts if you've worked on or used something similar. Also very curious to hear what you like and don't like about the project!

Comments URL: https://news.ycombinator.com/item?id=42681866

Points: 20

# Comments: 3

New comment by davidtos in "Ask HN: What are you working on (September 2024)?"

davidtos — Sun, 29 Sep 2024 21:05:04 +0000

Working on creating Java bindings for io_uring. Trying to get some better performance by batching downcalls and making the API Java friendly.

New comment by davidtos in "Java Virtual Threads: A Case Study"

davidtos — Wed, 17 Jul 2024 08:26:43 +0000

I did some similar testing a few days ago[1]. Comparing platform threads to virtual threads doing API calls. They mention the right conditions like having high task delays, but it also depends on what the task is. Threads.sleep(1) performs better on virtual threads than platform threads but a rest call taking a few ms performs worse.

[1] https://davidvlijmincx.com/posts/virtual-thread-performance-...

Virtual vs. Platform Threads for API Calls

davidtos — Thu, 11 Jul 2024 08:03:12 +0000

Article URL: https://davidvlijmincx.com/posts/virtual-thread-performance-api-calls/

Comments URL: https://news.ycombinator.com/item?id=40934567

Points: 1

# Comments: 0

First time right, with software development

davidtos — Thu, 28 Mar 2024 21:31:01 +0000

Article URL: https://davidvlijmincx.com/posts/first-time-right-software/

Comments URL: https://news.ycombinator.com/item?id=39857558

Points: 2

# Comments: 0

New comment by davidtos in "We switched to Java 21 virtual threads and got a deadlock in TPC-C for Postgres"

davidtos — Tue, 16 Jan 2024 09:33:36 +0000

That already exists luckily, you can even change the maximum number of carrier threads with:

- jdk.virtualThreadScheduler.maxPoolSize=10

New comment by davidtos in "Show HN: I automated half of my typing"

davidtos — Wed, 30 Aug 2023 20:50:48 +0000

This is exactly what i do. Pressing the leader key and another key to let it type sentences and boiler plate code.

Creating a layer for this sort of typing would also be really cool and not having to use that leader key the entire time.

New comment by davidtos in "Ask HN: Could you share your personal blog here?"

davidtos — Tue, 04 Jul 2023 18:23:04 +0000

https://www.davidvlijmincx.com/

I write mostly about concurrency and testing in Java for the last two years now.

I do it in hope that it helps people and to connect with people who share the same passion :D

Introduction and pitfalls of Java's new concurrency model

davidtos — Tue, 06 Jun 2023 21:13:37 +0000

Article URL: https://www.youtube.com/watch?v=UjzLaVI87mA

Comments URL: https://news.ycombinator.com/item?id=36219196

Points: 1

# Comments: 0

12 steps to Better Tests

davidtos — Mon, 27 Mar 2023 20:34:40 +0000

Article URL: https://www.davidvlijmincx.com/posts/12-steps-to-better-tests/

Comments URL: https://news.ycombinator.com/item?id=35332121

Points: 2

# Comments: 0

Steps to Better Tests

davidtos — Fri, 23 Sep 2022 12:18:09 +0000

Article URL: https://www.davidvlijmincx.com/posts/12-steps-to-better-tests/

Comments URL: https://news.ycombinator.com/item?id=32950898

Points: 1

# Comments: 0

New comment by davidtos in "Ask HN: Is having a personal blog/brand worth it for you?"

davidtos — Mon, 18 Jul 2022 13:03:29 +0000

I have been writing for my personal blog now for a year. The time spend writing and editing does feel worth it. My writing is a lot better than it was a year ago.

It helped me to get noticed at my work and to make new connections.

You will always learn something about the stuff you write. To write better, some new way of doing something, or something from the comments.

I run my blog through cloudflare pages. I only have to push a new markdown file to github and the Hugo template and cloudflare do the rest. Took only a few hours to setup correctly.

New comment by davidtos in "Ask HN: Share your personal site"

davidtos — Wed, 06 Apr 2022 22:09:02 +0000

https://www.davidvlijmincx.com/

I write mostly about Java, testing and future additions to the language.

New comment by davidtos in "Ask HN: Great Blogs by Programmers"

davidtos — Mon, 07 Feb 2022 17:50:19 +0000

Shameless plug of my blog. It’s about new and upcoming features in Java and unit testing. https://www.davidvlijmincx.com/