The React team has released a version of its compiler rewritten in Rust, a programming language chosen for speed, and has made that the official version going forward. A developer writing about the change described how the older version, which relied on a tool called Babel, was slowing his builds and tripling the time his code checks took to run.
Here is the part that matters to you: this is about how quickly a developer's machine does its work, not about how quickly your website loads for a customer. React is a way of building interactive websites and web apps. The "compiler" takes the code a developer writes and works out where the site can skip unnecessary work when things change on screen, something developers used to have to hand-tune themselves. A "linter" is a code checker that flags mistakes before they ship. Both run before your site goes live. Neither runs when a customer visits.
So if your site is a brochure site, a WordPress site, a Squarespace or Shopify store, this story has no bearing on you at all. It gets attention because React is used very widely, and because the wider trend (rewriting web tools in Rust so they run in seconds instead of minutes) is reshaping how a lot of teams work.
If your site does use React, there is one indirect thing worth knowing. The writer makes the point that the code checker is not optional when you let the compiler handle this work automatically. He describes shipping a broken, janky animation because the compiler quietly gave up on a piece of code that fell outside what it supports. Still functional, but visibly wrong. That is the failure mode: not an outage, just something on your site looking off, and nobody noticing until a customer mentions it.
What to do: nothing today. If you know your site is built with React, next time you speak to whoever maintains it, ask two things. Are the compiler's code checks turned on with all rules enabled, and is there any step that would catch a visual problem before it reaches customers. If the answer to the second one is "we look at it," that is worth a longer conversation.
Reported by:
