Use turbowarp to speed up rendering.
https://turbowarp.org/907856776?fps=60&turbo
Use the sliders to change the settings, click the rerender button to re-render the image.
fractal types:
0: mandelbrot
1: burning ship
2: celtic
3: buffalo
4: tricorn
TurboWarp is a Scratch mod that compiles projects to JavaScript to make them run really fast. Try it out by inputting a project ID or URL above or choosing a featured project below.