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tewak

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This commit is contained in:
Josh Bleecher Snyder 2021-07-06 12:26:14 -07:00
parent f27a61502d
commit 961a23b9df
1 changed files with 4 additions and 4 deletions
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8
wgengine/magicsock/magicsock.go
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@ -2861,17 +2861,17 @@ func (c *RebindingUDPConn) ReadFromNetaddr(b []byte) (n int, ipp netaddr.IPPort,
for {
pconn := c.currentConn()
// Optimization: Treat a few conn types specially.
// *uring.UDPConn can return netaddr.IPPorts directly.
// Optimization: Treat a few pconn types specially.
// For *net.UDPConn, ReadFromUDP gets partially inlined, avoiding allocating a *net.UDPAddr,
// as long as pAddr itself doesn't escape.
// *uring.UDPConn can return netaddr.IPPorts directly.
// The default case works, but it allocates.
var pAddr *net.UDPAddr
switch pconn := pconn.(type) {
case *uring.UDPConn:
n, ipp, err = pconn.ReadFromNetaddr(b)
case *net.UDPConn:
n, pAddr, err = pconn.ReadFromUDP(b)
case *uring.UDPConn:
n, ipp, err = pconn.ReadFromNetaddr(b)
default:
var addr net.Addr
n, addr, err = pconn.ReadFrom(b)