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Implement address caching in asyncWriterWorker #59

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Implement address caching in asyncWriterWorker #59

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16 changes: 13 additions & 3 deletions internal/client/async_runtime.go
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Original file line number Diff line number Diff line change
Expand Up @@ -163,17 +163,27 @@ drainRX:
}

// asyncWriterWorker fires packets from txChannel at the destination.
// Uses a per-worker address cache to avoid repeated net.ResolveUDPAddr calls.
func (c *Client) asyncWriterWorker(ctx context.Context, id int, conn *net.UDPConn) {
defer c.asyncWG.Done()
c.log.Debugf("\U0001F680 <green>Writer Worker <cyan>#%d</cyan> started</green>", id)

addrCache := make(map[string]*net.UDPAddr, 16)

for {
select {
case <-ctx.Done():
return
case pkt := <-c.txChannel:
addr, err := net.ResolveUDPAddr("udp", fmt.Sprintf("%s:%d", pkt.conn.Resolver, pkt.conn.ResolverPort))
if err != nil {
continue
resolverKey := fmt.Sprintf("%s:%d", pkt.conn.Resolver, pkt.conn.ResolverPort)
addr, ok := addrCache[resolverKey]
if !ok {
var err error
addr, err = net.ResolveUDPAddr("udp", resolverKey)
if err != nil {
continue
}
addrCache[resolverKey] = addr
}

if c.tunnelPacketTimeout > 0 {
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