[2.0.62] Build order affects belt throughput of direct-to-splitter mining

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HeliGungir
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[2.0.62] Build order affects belt throughput of direct-to-splitter mining

Post by HeliGungir »

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Context:
At high mining productivity, mining directly into a splitter is one way to increase the drill's output. The splitter must be oriented perpendicular to the miner for this to work.
Expectation:
The left copy of each mining drill is outputting a full belt, which is the expected behavior. This happens when the splitter is built after the belts, or during the same tick as the belts if I pause the game via the editor.
Bug:
The right copy of each mining drill is not outputting a full belt, which is undesired behavior. This happens when the splitter is built before the belts.
All variations of rotating, flipping, and using copy/paste/undo seems to be consistent with the above observations.
Related:
Inserters also drop items more quickly to splitters than to belts. The throughput of this was lower when 2.0 came out, and when this was reported as a bug, the old 1.1 behavior was not considered sufficiently "expected behavior", so it was not restored to 1.1 speeds. I disagree with that decision (suggestion thread here) and I certainly do not want a similar "fix" to direct-to-splitter mining.
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