It's pretty easy to run into render performance issues with React, especially on older machines, when you have a very dynamic UI. At work, we dynamically genera

It's pretty easy to run into render performance issues with React, especially on older machines, when you have a very dynamic UI. At work, we dynamically generate several SVG charts and "badges" on certain pages. Putting even one of those onto a page without any optimization created about a half second delay between actions on my high-end machine, so we had to spend some time making sure that things weren't re-rendering needlessly and that DOM nodes were getting reused. But even if that seems like an atypical use case, we had similar issues rendering complex tables, purely due to the amount of DOM nodes needing to be put onto the page at once. So it might not be an everyday kind of problem, but I don't think it's uncommon to run into performance issues with React.