soypat/lneto
1
0
Fork 0
mirror of https://github.com/soypat/lneto.git synced 2026-09-10 16:49:37 +00:00
Code Issues Packages Projects Releases 1 Wiki Activity

Reduce heap allocs 2 (#46)

Browse Source 
* 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
Download Patch File Download Diff File Expand all files Collapse all files
x/xnet/pcap-printer.go
+27 -1
View File
@@ -62,7 +62,33 @@ func (stack *CapturePrinter) PrintPacket(prefix string, pkt []byte) {
if err == nil {
if useTimestamps {
diff := captime.Sub(stack.origin)
fmtbuf = strconv.AppendFloat(fmtbuf, diff.Seconds(), 'f', stack.timeprec, 32)
ms := diff.Milliseconds()
fmtbuf = strconv.AppendInt(fmtbuf, ms/1000, 10)
fmtbuf = append(fmtbuf, '.')
frac := ms % 1000
if frac < 0 {
frac = -frac
}
// Pad fractional part to timeprec digits (up to 3).
switch {
case stack.timeprec >= 3:
if frac < 100 {
fmtbuf = append(fmtbuf, '0')
}
if frac < 10 {
fmtbuf = append(fmtbuf, '0')
}
fmtbuf = strconv.AppendInt(fmtbuf, frac, 10)
case stack.timeprec == 2:
frac /= 10 // truncate to centiseconds
if frac < 10 {
fmtbuf = append(fmtbuf, '0')
}
fmtbuf = strconv.AppendInt(fmtbuf, frac, 10)
case stack.timeprec == 1:
frac /= 100 // truncate to deciseconds
fmtbuf = strconv.AppendInt(fmtbuf, frac, 10)
}
fmtbuf = append(fmtbuf, ' ')
}
fmtbuf = append(fmtbuf, prefix...)