If I have two parallel bar one over another and they are quite long and quite far apart, the current support just run from the bottom one straight up to the top one. Actually this is not very efficient.
Current support:
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My suggestion:
Use some pattern to generate as less support as possible to reduce print time but still achieve the same support effect.
The following is only an example of the pattern.
(In the following drawing, consider the underlines as empty space, the vertical line is support column. It is hard to draw here. But you get the idea. )
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___||__||__||__||_____||__||__||__||
______||__||__||__________||____||
________||__||______________||||
_________|||_________________||
_________|||_________________||
_________|||_________________||
_________|||_________________||
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The above drawing shows at least 70% of time reduced by not printing those unnecessary support.