logos-messaging/go-multiaddr
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small Join optimizations

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This commit is contained in:
Steven Allen 2018-10-01 15:44:27 -07:00
parent 0f158f1163
commit 2999d4efba
1 changed files with 9 additions and 4 deletions
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13
util.go
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@ -18,6 +18,14 @@ func Split(m Multiaddr) []Multiaddr {
// Join returns a combination of addresses. // Join returns a combination of addresses.
func Join(ms ...Multiaddr) Multiaddr { func Join(ms ...Multiaddr) Multiaddr {
switch len(ms) {
case 0:
// empty multiaddr, unfortunately, we have callers that rely on
// this contract.
return multiaddr{}
case 1:
return ms[0]
}
length := 0 length := 0
bs := make([][]byte, len(ms)) bs := make([][]byte, len(ms))
@ -29,10 +37,7 @@ func Join(ms ...Multiaddr) Multiaddr {
bidx := 0 bidx := 0
b := make([]byte, length) b := make([]byte, length)
for _, mb := range bs { for _, mb := range bs {
for i := range mb { bidx += copy(b[bidx:], mb)
b[bidx] = mb[i]
bidx++
}
} }
return multiaddr{bytes: b} return multiaddr{bytes: b}
} }