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Handle connection vector inline 

Normally, you will gain by resursing a nested loop only over the
pairs that are not already handled.  In this case, however, you lose
time because you step outside of the cache by adding the reciprocal test
at each step.

Instead, we process one element at a time, keeping it cached and loop
over all other elements to add to the connection.  This saves us about
75% of the time for larger loops (e.g. stacked power pins on a large
BGA)

Fixes https://gitlab.com/kicad/code/kicad/issues/10974
This commit is contained in:
Seth Hillbrand 2022-03-28 13:29:34 -07:00
parent a8004cb161
commit 3a98eacdb9
1 changed files with 7 additions and 5 deletions
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12
eeschema/connection_graph.cpp
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@ -640,12 +640,15 @@ void CONNECTION_GRAPH::updateItemConnectivity( const SCH_SHEET_PATH& aSheet,
connected_item->SetLayer( busLine ? LAYER_BUS_JUNCTION : LAYER_JUNCTION );
}
for( auto test_it = primary_it + 1; test_it != connection_vec.end(); test_it++ )
SCH_ITEM_SET& connected_set = connected_item->ConnectedItems( aSheet );
connected_set.reserve( connection_vec.size() );
for( SCH_ITEM* test_item : connection_vec )
{
bool bus_connection_ok = true;
SCH_ITEM* test_item = *test_it;
wxASSERT( test_item != connected_item );
if( test_item == connected_item )
continue;
// Set up the link between the bus entry net and the bus
if( connected_item->Type() == SCH_BUS_WIRE_ENTRY_T )
@ -673,8 +676,7 @@ void CONNECTION_GRAPH::updateItemConnectivity( const SCH_SHEET_PATH& aSheet,
test_item->ConnectionPropagatesTo( connected_item ) &&
bus_connection_ok )
{
connected_item->AddConnectionTo( aSheet, test_item );
test_item->AddConnectionTo( aSheet, connected_item );
connected_set.push_back( test_item );
}
}