Rewritning if condition to speed up in python

I have following piece of code with if statement within a function. When I run it would take long time and it is a way to rewrite if condition or a way to speed up this sample code?

import numpy as np

def func(S, R, H):
    ST =  S * R
    if ST <= - H:
      result = - H
    elif ST >= - H and ST < 0:
      result = ST
    else:
      result = min(ST, H)
    return result

y=[]
t1= time()
for x in np.arange(0, 10000, 0.001): 
    y.append(func(3, 5, x))
t2 = time()
print("time with numpy arange:", t2-t1)

time taken to run the code:

 10 s