Roy van Rijn
where else to find them
what they talk about
all 7 in the filters
where they keep going back
- J2 editions2018–2023
all 6 in the filters
on a stage with
- Gunnar Morlingonce
- Roy Braamonce
- Roy Wasseonce
who talks about the same things
- Simon Ritter72 talks
- Miro Cupak14 talks
- Alasdair Collinson9 talks
- Maurice Naftalin30 talks
- James Weaver18 talks
- Ionut Balosin13 talks
| title | conference | date |
|---|---|---|
| How Fast Can You Parse 1 Billion Rows in Java? – Insane Speed Test | GOTO Copenhagen 2025 | 2025-09-29 |
Challenge turns a 4 minute 50 second baseline into about 1.5 seconds to parse 1 billion weather rows using Java, demonstrating concrete techniques… | ||
| 1BRC – Nerd Sniping the Java Community | Devoxx Belgium 2024 | 2024-10-07 |
A one‑billion‑row CSV (13 GB) is reduced to an aggregated min/max/avg in rules‑bounded runs using parallel chunked reads, memory‑mapped files, integer… | ||
| Java, How Fast Can You Parse 1 Billion Rows of Weather Data? | GOTO Amsterdam 2024 | 2024-06-10 |
Challenge: parse 1 billion rows (~15GB) of city + one-decimal temperatures with Vanilla Java and go from a 4+ minute baseline to sub-2-second results. Uses… | ||
| J-Fall 2023: Roy Wasse & Roy van Rijn | J-Fall 2023 | 2023-11-09 |
Claim: observable programming skill predicts job performance better than certifications or degrees. A browser-hosted VM (via Apache Guacamole) runs realistic… | ||
| 30 minutes of Failure | J-Fall Virtual 2020 | 2020-11-03 |
A string of concrete failures and fixes: using mqj explorer that deletes queues without confirmation; clicking a red stop button in pivotal cloud foundry that… | ||
| The Magic of Music Matching | GOTO Oslo 2020 | 2020-03-03 |
Recreates how a Shazam clone is built in a weekend: capture microphone audio with Java AudioSystem, decode MP3s with JLayer/MP3SPI, compute windowed FFTs to… | ||
| Community keynote - Quantum Computing: Mind-bogglingly weird! | J-Fall 2018 | 2018-11-08 |
A Java simulator models single qubits with complex amplitudes, applies unitary gates as matrices, and shows how a Hadamard plus CNOT produces a Bell state… | ||
| nothing matches | ||