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The current expansion pruning in the router uses the drive point of every RRNode ((xlow ,ylow) for non-directional nodes). This check is inside a hot loop (in connection_router.cpp), so there may be performance benefits to store (xdrive, ydrive, dir) in the RRG storage, since the router will only fetch two values instead of three + a branch.
For bidir wires (xdrive, ydrive) can be just (xlow, ylow).
The text was updated successfully, but these errors were encountered:
The current expansion pruning in the router uses the drive point of every
RRNode
((xlow ,ylow)
for non-directional nodes). This check is inside a hot loop (inconnection_router.cpp
), so there may be performance benefits to store(xdrive, ydrive, dir)
in the RRG storage, since the router will only fetch two values instead of three + a branch.For bidir wires
(xdrive, ydrive)
can be just(xlow, ylow)
.The text was updated successfully, but these errors were encountered: