Whether a build makes the tables only a waveform VIEWER needs: WaveComps, Drivers and WaveIndex. Nothing that RUNS a simulation reads any of them - not the run loop, not the reducers, not FastExtract, not RamView - so a simulator that only runs and is read over a wire can leave them out. They are sized by the EXPANSION, one entry per port of every instance, which is exactly what a remote simulator exists to keep out of the process that draws. The custom-component port linking that used to be part of the same phase is not optional and happens either way: it re-points a custom component's ports at the arrays of the Input and Output components inside it, which is what makes those ports readable at all.