Well yes! You see that your text editor is now running on top of an entire hidden webstack, which includes a GPU-accelerator compositor and vector-accelerated f

Well yes! You see that your text editor is now running on top of an entire hidden webstack, which includes a GPU-accelerator compositor and vector-accelerated font rendering just in case you decide to zoom or rearrange your sidebar so that reflow and layout and drop shadows and transparency and animation all happen smoothly. You'll need a ton of memory and CPU to crank through all the dynamic optimization that is necessary to make the oodles of JavaScript not crawl.