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What's an event loop anyways?

Event loops are a paradigm for processing events different than your typical single-threaded or multi-threaded application. Your request gets broken down into async "events" that are executed in a loop to improve performance and minimize synchronization across threads. It is famously used by Node.js as the backbone of their event processing and also by several other technologies like Redis and…

Event loops are a method for handling events, distinct from conventional single-threaded or multi-threaded applications. Your request is transformed into asynchronous events, which are executed in a loop to enhance performance and reduce synchronization across threads. This approach is commonly employed by Node.js as the foundation for their event processing, as well as by other technologies such as Redis and Nginx.

In this article, we will delve into the purpose behind the creation of this paradigm and what it aims to optimize. Upon completion, you will gain a deeper understanding of the concept, surpassing the basic knowledge of "don't block the event loop."

Written by urgent.news from Dev.to's reporting — not their text. Machine-written — may contain errors; check the original before relying on it.

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The Principle of Least Privilege: Why File Permissions Like 600/644/755 Exist

Anyone who has worked with SSH private keys has run into an instruction to "set it to 600." Config files, by contrast, often get 644, and executable scripts get 755. What do these three-digit numbers actually mean, and why does the right number depend on what kind of file you're dealing with?

  • File permissions 600/644/755 represent Unix-style access rights.
  • Each number breaks down into owner, group, others, and read/write/execute.
  • Principle of least privilege guides granting minimal required access.

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