[web2py] cost of importing into models vs define functions

[Richard]

Hello,

I am in the process to move some functions declared kind of globally into models to speed my app since I found it has some important performance penalty to have been too lazy to "modulized" these functions... I would know if importing these functions in models global kind again would lead to the same performance penalty??

Thanks

Richard

[Niphlod]

uhm................you lost me at
"move some function declared kind of globally into models .................... if importing there functions in models global kind"

let's just stick to basics: models are executed at every request. Modules are imported at the first occasion and never again.

[Jose]

Hi

[*1*]
models/
    model1.py
    model2.py
    model3.py
    model4.py

vs

[*2*]
modules/
    model1.py
    model2.py
    model3.py
    model4.py

models/
    model0.py (import model1, model2, model3, model4)


You say [2] is more efficient than [1]?

[Richard Vézina]

I move functions declared in models... Since all my models files seems to be executed (looking to models_to_run), these functions are accessible from everywhere (globals)...

Now I import all the moved functions in the same models they were commenting the old declarations and I get some speed improvement... So I guess they (functions) are imported only once as you said Niphold...

@Jose, not exactly, more this :

[*Slow*]

models/

  global_functions.py (functions declared old implementation)

[*Faster*]

models/

  global_functions.py (import from modules/global_functions.py)

modules/

  global_functions.py (functions are declared here now)

Richard

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[Niphlod]

[2] imports model1, model2, model3 one time only. those are not re-evaluated. 

[1] also if not "redefining", it still parses the python code at every request.