[R-sig-ME] gamm4 models memory intensive

[Gitu wa Mbui]

Hi,

I am using gamm4 models in a model selection framework, where I have lined
up a few thousands of gamm4 models for running within this framework.
However, each gamm4 model object seems to enclose an environment of ~95MB,
even though the object size for each gamm4 model is ~1.5 MB.
i.e
> object_size(gamm4model)

92.1 MB


This makes it impractical to run more than a few models. Is there a way
around this large memory demand by gamm4?

gamm on the other hand doesnt seem to enclose such a large environment.
 However, given that gamm uses PQL, it doesn not make alot of sense to

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