Problems saving random forest model

Hi all,

I'm having a strange problem when saving a random forest model. When using the JLD module to save the model created by the DecisionTree module, it usually takes a huge amount of space on disk. For instance, a model that had a size of 155 Mb as a variable in julia, would take more than 2 Gb to save in disk and an eternity to save the model!

I solved this problem by using the serialize and deserialize commands. After this, I was able to save the models. However, the drawback of this method is that maybe it won't be possible to read the models in
other Julia versions. I didn't know if this is an issue from the DecisionTree module or the JLD module but would like to know if you have another workaround.

Cheers,

The report mentions JLD, the DecisionTree random forest model, and Julia's serialize/deserialize commands, but names no files, tests, or entry points. Start by reproducing the size and save-time difference with the reported model, then compare JLD and serialization behavior across Julia versions. Done should identify whether JLD or DecisionTree causes the expansion and document a reliable workaround.