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Reduce heap allocs 2 (#46)

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* reduce heap allocations in tcp logging; omit use of AppendFloat which allocates a metric sh*tton

* debugheaplog: better heap statistic logging

* heap: use string for pcap.Frame.Protocol

* add potential to eliminate Flags.String heap alloc, remove incorrect HEAP comments

* add StackAsync.DebugErr and httpraw.SetBytes

* many heap alloc reductions and replacement of bytes.Equal with internal.BytesEqual
This commit is contained in:
Pat Whittingslow
2026-02-28 19:20:46 +01:00
committed by GitHub
parent eab43c4653
commit 989bb6a0b9
22 changed files with 511 additions and 163 deletions
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internet/pcap/capture_test.go
+9 -8
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@@ -209,7 +209,7 @@ func TestRightAlignedFields(t *testing.T) {
// Find IPv6 frame.
var ipv6Frame *Frame
for i := range frames {
if frames[i].Protocol == ethernet.TypeIPv6 {
if frames[i].Protocol == "IPv6" {
ipv6Frame = &frames[i]
break
}
@@ -476,15 +476,16 @@ func ExampleFormatter_dhcp() {
// Output:
// Ethernet len=14; destination=ff:ff:ff:ff:ff:ff; source=de:ad:be:ef:ca:fe; protocol=0x0800
// IPv4 len=20; version=0x04; (Header Length)=5; (Type of Service)=0x00; (Total Length)=312; identification=0x6043; flags=0x4000; (Time to live)=0x40; protocol=0x11; checksum=0xd972; source=0.0.0.0; destination=255.255.255.255
// UDP [RFC768] len=8; (Source port)=68; (Destination port)=67; size=292; checksum=0x0000
// UDP len=8; (Source port)=68; (Destination port)=67; size=292; checksum=0x0000
// DHCPv4 len=240; op=1; (Hardware Address Type)=0x01; (Hardware Address Length)=6; Hops=0x00; (Transaction ID)=0xdeadbeef; (Start Time)=0x0001; Flags=0x0000; (Client Address)=0.0.0.0; (Offered Address)=0.0.0.0; (Server Next Address)=255.255.255.255; (Relay Agent Address)=0.0.0.0; (Client Hardware Address)=de:ad:be:ef:ca:fe; options
// (DHCP message type.)=1
// (Parameter request list)=0x0102031a1c060f2a
// (DHCP maximum message size)=558
// (Requested IP address)=192.168.1.100
// (Client identifier)="lneto-test"
// (Hostname string)="myhost"
// (DHCP message type.)=1
// (Parameter request list)=0x0102031a1c060f2a
// (DHCP maximum message size)=558
// (Requested IP address)=192.168.1.100
// (Client identifier)="lneto-test"
// (Hostname string)="myhost"
}
func writeOpt(dst []byte, opt dhcpv4.OptNum, data ...byte) int {
dst[0] = byte(opt)
dst[1] = byte(len(data))