As a former JavaScript developer and current JavaScript hobbyist I see why this article’s language is deeply offensive. Most employed JavaScript developers absolutely suck at what they do and are highly sensitive about it. Everything other than praise is offensive. The surest indication of maturity is abandoning politeness in favor of evidence, empathy, or stronger arguments.

On the other hand Zig is often regarded as the fastest executing modern programming language. They have earned the ability to complain about performance like no one else. The article cites precise issues they have with GitHub.

Furthermore JavaScript, when not written by monkeys, is extremely fast which further qualifies their complaint. For example I have a large SPA that loads in the browser from across a network in around 0.065 seconds and achieves full rendering and state restoration in about 0.135 seconds. If I drop the largest one feature from that SPA I can get full rendering and state restoration in about 0.08 seconds. Your typical JavaScript developer, on the other hand, struggles to copy/paste code into a JSX template someone else defined with no idea how to measure performance. To me that’s what’s offensive.