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optimizations on the Round Robin #1201

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optimizations on the Round Robin #1201

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828ba83
Optimizations on the Round Robin strategies
ImAubrey Apr 17, 2024
256e9d8
Update loadbalance.go
ImAubrey Apr 17, 2024
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34 changes: 17 additions & 17 deletions adapter/outboundgroup/loadbalance.go
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Original file line number Diff line number Diff line change
Expand Up @@ -5,8 +5,8 @@ import (
"encoding/json"
"errors"
"fmt"
"net"
"sync"
"net"
"time"

"github.com/metacubex/mihomo/adapter/outbound"
Expand Down Expand Up @@ -134,31 +134,31 @@ func (lb *LoadBalance) IsL3Protocol(metadata *C.Metadata) bool {
}

func strategyRoundRobin(url string) strategyFn {
var availableProxies []C.Proxy
idx := 0
idxMutex := sync.Mutex{}

return func(proxies []C.Proxy, metadata *C.Metadata, touch bool) C.Proxy {
idxMutex.Lock()
defer idxMutex.Unlock()

i := 0
length := len(proxies)

if touch {
defer func() {
idx = (idx + i) % length
}()
}

for ; i < length; i++ {
id := (idx + i) % length
proxy := proxies[id]
if proxy.AliveForTestUrl(url) {
i++
return proxy
// check list
availableProxies = []C.Proxy{}
for _, proxy := range proxies {
if proxy.AliveForTestUrl(url) {
availableProxies = append(availableProxies, proxy)
}
}
// fallback
if len(availableProxies) == 0 {
return proxies[0]
}
}

return proxies[0]
proxy := availableProxies[idx]
// reset idx
idx = (idx + 1) % len(availableProxies)
return proxy
}
}

Expand Down