Well, if you have such an increase, your model seems to have a lot of infill. For a cube of 100x100x100mm gyroid will increase the printing time by 3h, which is nearly the double.
However, most models does not have such an amount of infill, as this is filament waste. For example, a big part of the cube could be just empty, instead of wasting filament here.
But yes, in this case I would recommend another infill, e.g. the default grid, rectilinaer or the new zig zag. However, it really depends on the model, the filament you are using and the physical attributes your product requires. Do you have link to the model?