Are these Peter de Jong attractors? I'm trying to work out how my interpretation of the calculations (in JS)[1] compare with the authors code, but trying to me

Are these Peter de Jong attractors? I'm trying to work out how my interpretation of the calculations (in JS)[1] compare with the authors code, but trying to measure performance in CodePen is ... difficult to work out. My approach was to: 1. Run the CodePen with the inspector open; 2. Start recording performance; 3. Right click on the display panel and select 'Reload Frame'; 4: Stop recording performance after the images reappear. ... But when I look at the results nothing is making sense. Clearly my approach was wrong. [1] - https://codepen.io/kaliedarik/pen/JjRJwNa https://codepen.io/kaliedarik/pen/JjRJwNa