The difference in speed is still huge, for example sbcl

  (time (loop for i from 1 below (expt 10 8) by 2 when 
      (zerop (rem i 3) count t)) 

this takes 0.131 seconds

versus python

  import time
  def gato():
    start = time.time()
    s = sum(1 if i % 3 == 0 else 0  for i in       range(1,10\**8,2))
    end = time.time()
    print(s)
    print(end-start)

  gato() 

takes 2.26 seconds, that is 20 times the sbcl version (I am using python 3.10.6)