From e52ad631ccc09b12d19934f5bad2b8efe039588d Mon Sep 17 00:00:00 2001
From: Daniel Czerwonk <daniel@dan-nrw.de>
Date: Thu, 17 May 2018 13:59:10 +0200
Subject: [PATCH] improved performance on as path prepend
---
route/bgp.go | 15 +++++++++++++--
1 file changed, 13 insertions(+), 2 deletions(-)
diff --git a/route/bgp.go b/route/bgp.go
index 0942770d..e56b140b 100644
--- a/route/bgp.go
+++ b/route/bgp.go
@@ -2,6 +2,8 @@ package route
import (
"fmt"
+ "strconv"
+ "strings"
"github.com/taktv6/tflow2/convert"
)
@@ -155,11 +157,20 @@ func (b *BGPPath) Print() string {
}
func (b *BGPPath) Prepend(asn uint32, times uint16) {
+ if times == 0 {
+ return
+ }
+
+ asnStr := strconv.FormatUint(uint64(asn), 10)
+
+ path := make([]string, times+1)
for i := 0; uint16(i) < times; i++ {
- b.ASPath = fmt.Sprintf("%d %s", asn, b.ASPath)
+ path[i] = asnStr
}
+ path[times] = b.ASPath
- b.ASPathLen = b.ASPathLen + uint16(times)
+ b.ASPath = strings.TrimSuffix(strings.Join(path, " "), " ")
+ b.ASPathLen = b.ASPathLen + times
}
func (p *BGPPath) Copy() *BGPPath {
--
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