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Cover image for balalaika IT newsletter #1
Andrey Goncharov for balalaika IT

Posted on • Edited on • Originally published at blog.balalaikait.com

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balalaika IT newsletter #1

Frontend

Node.js

  • Node.js v13.10.0 introduced a built-in CLS API, namely, new class AsyncLocalStorage located in the well-known experimental async_hooks module. In this short post you will get familiar with AsyncLocalStorage and its capabilities.

  • Worker Threads are gaining a lot of interest from Node.js community nowadays. If you want to learn more low-level details of their implementation, you should read this post.

  • Ryan Dahl thinks Deno is mature enough to release 1.0. Check it out yourself.

Java

General

  • Andy Pavlo gives us a mind-blowing overview of database internals in his series of lectures "Advanced Database Systems". Ever wondered how your favorite tweets are stored? How challenging is it to implement a database at scale? Here is your answer.

  • Delta-delta encoding, Simple-8b, XOR-based compression, and more - These algorithms aren't magic, but combined they can save over 90% of storage costs and speed up queries. Here’s how they work.

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How I fixed 20 seconds of lag for every user in just 20 minutes.

Our AI agent was running 10-20 seconds slower than it should, impacting both our own developers and our early adopters. See how I used Sentry Profiling to fix it in record time.

Read more

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