Merge pull request #47 from libp2p/feat/optimize-allocations

preallocate duplicate checking map in Peers

Merge pull request #47 from libp2p/feat/optimize-allocations
preallocate duplicate checking map in Peers
4986ec89 · Steven Allen · GitHub · 3827855f · b73b1da8 · 4986ec89
Unverified Commit 4986ec89 authored Dec 06, 2017 by Steven Allen Committed by GitHub Dec 06, 2017
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swarm.go swarm.go +1 -1

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--- a/swarm.go
+++ b/swarm.go
@@ -313,7 +313,7 @@ func (s *Swarm) CloseConnection(p peer.ID) error {
 func (s *Swarm) Peers() []peer.ID {
 	conns := s.Connections()

-	seen := make(map[peer.ID]struct{})
+	seen := make(map[peer.ID]struct{}, len(conns))
 	peers := make([]peer.ID, 0, len(conns))
 	for _, c := range conns {
 		p := c.RemotePeer()