Hi, I plan to heavily use a function generated with lambdify from a sympy 
expression which has repeated occurences of some subexpressions. 
Specifically it will have a lot of cosine and sine expressions with the 
same arguments. I don't know if lambdify can notice this pattern and 
evaluate that subexpression only once, or if it will call it (the numeric 
sine and cosine functions) as many times as it appears, or if I have to 
specify it somehow. I am afraid that it would mean a considerable 
performance loss if, for example, it will have to call 2-3 times as many 
trigonometric functions as a hand-written code, since I plan to use it a 
lot. Can somebody provide me some information?

Thanks in advance :)

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