javier ramirez (@supercoco9) / X

javier ramirez

10.1K posts

javier ramirez

@supercoco9

Developer Advocate at QuestDB and all around happy person. Fan of Open Source,Tech Communities,Data&ML.He/him.Ex-AWS,Ex Google Developer Expert. @[email protected]

Madrid, Spain

Joined March 2007

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javier ramirez
@supercoco9
Jul 8
I'm speaking at Big Data LDN 2026! I will talk about our experience working with agents to build on top of #QuestDB. If you are in London in September, it is a good opportunity to see what's trending in Data and AI. invt.io/1txb3uyerft #BigDataLDN
Connect with me at Big Data LDN!
From invt.io
javier ramirez
@supercoco9
May 21
My kid, who glides through netflix, disney+, amazon prime, and youtube, was totally puzzled today when I asked her to change the TV channel. Same device, same remote. Completely different mental schema
javier ramirez
@supercoco9
May 13
These are the type of blog posts I would like to be able to write. My colleague @AndreyPechkurov goes deep to explain how we (ahem, he) added Window Joins to QuestDB, and why it outperforms other database engines.
QuestDB
@QuestDb
May 13
WINDOW JOIN in #QuestDB is not just syntactic sugar. We published a deep dive into how we parallelized and vectorized it, plus benchmarks against Timescale, DuckDB, and ClickHouse. On the tested workload: 5x faster than the previous QuestDB path. Link in thread 👇
javier ramirez
@supercoco9
Feb 17
A few weeks ago my colleague @jerrinot noticed an interesting commit in OpenJDK fixing a 7 year old performance issue. He tested it out and found a 400x speed boost. Yesterday the @ThePrimeagen did a rad video featuring his content. Pretty cool! youtube.com/watch?v=R3ydGM…
javier ramirez
@supercoco9
Jan 9
How does your database cope with datasets with 6000+ columns? #QuestDB handled them fine, but struggled to copy data across tables. No more. github.com/questdb/questd…. And this is why you *sometimes* need specialised databases
github.com
fix(sql): support copies of very wide tables and result sets by nwoolmer · Pull Request #6525 ·...
Fixes #3312 Fixes #3326 This PR fixes a bug preventing copying of data between tables with thousands (6000+) of columns, through upgrades to RecordToRowCopier. The same bug existed for RecordSink, ...