Pronterface Timing is Wrong

When I slice (using SLic3r) a model and load it into Pronterface it says something like 2.5 hours but when it starts going quickly changed to half again. It is quite consitently half on top of the original stated time.

Does anyone know why this is?

G./

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[GPPK]

I reailsed that too, but have no idea what's the reason. A wild guess would be that pronterface simply takes the remaining steps divided by the time taken for the last step to estimate the remaining time. Because it processes the information line by line, it's not able to foresee what's ahead, and there are lots of paths with varying speed. Hence, the difference. Again, this is just my wild guess.

I'm using kisslicer, and the estimated time by the slicer is usually pretty accurate.

My time estimate from slicer models in pritnerface is consitently 33-50% of the real time.