Viewing profile — TheTank

Hey of course, happy to meet and exchange about our fun projects. You can send me an email using the address in the above comment and we'll setup something!

Hey, yes I can do that. I will brush this up, package all the bits (3d files, pcb files, code etc), and add to github. On another note, would you happen to live in London? If you r…

I'm afraid not because it would only run on the device so you'd need to make one using a raspberry pi pico and the exact same display (Pimoroni display pack) as it leverages its gr…

Thanks for the feedback. Yes it takes some practice to be able to read and understand an orderbook, and I find that visualisations help a lot, so does making your own derived metri…

It's a tough question because most of what I learned was on the job and I don't really remember books specifically on the topic. It also depends on what product and market you are …

There isn't any library for the trading UI or graphics elements. The only library in this case was the display graphics library which allows to draw simple primitives such as squar…

They did continue participating but it's true that this became a sort of electric train where daddy buys it for the children and ends up playing the most with it. The trading game …

You're right and besides that, it's not an interesting game for them. I continued involving him using the same platform, but we made more age-appropriate games. It's easy to upload…

Author here. Thanks for reading this post. I had fun making this and thought the path that led me to this might be interesting for others. I’m really interested in feedback and ide…

Author here. You are right this is convoluted and confusing. I wanted to write an informal introduction to options using a more tangible example for those who are put off by the ma…

Congrats on launching. It looks like it’s only email login. Do you have an idea when you will release Oauth logins?

Thanks! Indeed we are still light on available aggregations. Right now we are focused on building a fast infrastructure to support them, for example Swissmap / "rosti" for keyed ag…

Thanks for your question! The main value proposition is raw performance which translates into hardware efficiency and ultimately, costs at scale. To get a rough idea of how we comp…

The trips table takes 313GB. QuestDB is not an in-memory DB. The data sits on SSD EBS volumes.

Tanks for the feedback. WHERE queries are slow indeed. This is not because of the load but rather because WHERE clauses are not yet implemented under the fast path. Currently they …

Will do. Thanks for offering help!

Yes, this is part of the roadmap. Right now, we don't have any interesting query to showcase that would use these columns - they are here because they are part of the original data…

Very accurate! Regarding the theme of joins, I would just add that QuestDB also has a concept called SYMBOL which allows to store repetitive strings into a table as an integer in t…

Thanks for the feedback, we'll look into it!

We will definitely make QuestDB distributed in the near future. Today, our focus is to extract the maximum performance out of a single node. If we start scaling out too early, it m…

One step beyond good Java GCs is to write fully zero-GC Java code. The advantage of it is complete control over your performance which means your software is going to be consistent…

Thanks for sharing. Do I assume correctly that this tool takes in dividend expectations and not only announced dividends? Building a portfolio around dividend expectations is defin…

Thanks for sharing. Do I understand correctly that this requires loading the whole file in memory along with an ordered list of keys? Or is it just the first n bytes that are loade…

I find the concept interesting and I can see real applications for something like this (delaying someone's access to a file). For example, one could use that to disseminate press r…

Interesting project. Out of curiosity, why did you compare against kdb+ since the models are very different? KDB is mostly used for in-memory time-series while your seem to be a gr…