This video explanation is great because it shows an example using small numbers, if it wasn't for that example my code would be wrong.
Still: the code takes 0.5 seconds to calculate 300 point doublings using 256 bit numbers. I found it's faster to do point addition or doubling using the Jacobi transformation or Weierstrass transformation but I can't find explanation examples using small numbers.
Can someone write an example of point addition using Jacobi transformation?