Bandwidth: add bandwidth modelling for cost model #159
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Begin by calculating Event sizes for some known types.
Distinct from matrix calculations in Jackson, recursive approach Handle Join correctly Detect "chopTime" for windows and handle accordingly
WearableExample has a handful of composite types that we need to measure for Bandwidth calculations. As a quick fix, duplicate the types in Bandwidth. Longer term we should accept user-provided Event size information.
Adjust cost model to consider bandwidth. Move bandwidthLimit to a GenerateOpts field, so the user can override it. Provide a limit in test_overUtilisedPartition_acceptable such that the desired rewrite is not rejected by overBandwidthLimit and the test passes.
Apply a cost based on the rate of transmission (on top of bandwidth) to model the cost of establishing a network connection.
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