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FlowStat: Replace btree_map with flat map which is inlined in small case

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Inline storage for size <= 2
Size = 1 is ~90%
Size = 2 is ~9%
Size >=3 is ~1% and gets a separate allocation
This commit is contained in:
Jonathan G Rennison
2019-09-30 10:26:07 +01:00
parent 90550d9642
commit 0246d59c8d
8 changed files with 275 additions and 161 deletions
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4
src/cargopacket.cpp
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@@ -663,10 +663,10 @@ bool VehicleCargoList::Stage(bool accepted, StationID current_station, StationID
FlowStat new_shares = *flow_it;
new_shares.ChangeShare(current_station, INT_MIN);
StationIDStack excluded = next_station;
while (!excluded.IsEmpty() && !new_shares.GetShares()->empty()) {
while (!excluded.IsEmpty() && !new_shares.empty()) {
new_shares.ChangeShare(excluded.Pop(), INT_MIN);
}
if (new_shares.GetShares()->empty()) {
if (new_shares.empty()) {
cargo_next = INVALID_STATION;
} else {
cargo_next = new_shares.GetVia();