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netstack: pre-allocate slices in PacketBuffer.AsSlices()

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PiperOrigin-RevId: 615561646
This commit is contained in:
Kevin Krakauer
2024-03-13 15:27:40 -07:00
committed by gVisor bot
parent 09f56c1f1e
commit d25ba02fee
1 changed files with 2 additions and 1 deletions
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pkg/tcpip/stack/packet_buffer.go
+2 -1
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@@ -280,7 +280,8 @@ func (pk *PacketBuffer) Data() PacketData {
// Note that AsSlices can allocate a lot. In hot paths it may be preferable to
// iterate over a PacketBuffer's data via AsViewList.
func (pk *PacketBuffer) AsSlices() [][]byte {
var views [][]byte
vl := pk.buf.AsViewList()
views := make([][]byte, 0, vl.Len())
offset := pk.headerOffset()
pk.buf.SubApply(offset, int(pk.buf.Size())-offset, func(v *buffer.View) {
views = append(views, v.AsSlice())