refactor: provider init order

adapter/provider/vehicle.go

@@ -73,7 +73,7 @@ func (h *HTTPVehicle) Read() ([]byte, error) {
 	transport := &http.Transport{
 		// from http.DefaultTransport
 		MaxIdleConns:          100,
-		IdleConnTimeout:       90 * time.Second,
+		IdleConnTimeout:       30 * time.Second,
 		TLSHandshakeTimeout:   10 * time.Second,
 		ExpectContinueTimeout: 1 * time.Second,
 		DialContext: func(ctx context.Context, network, address string) (net.Conn, error) {

hub/executor/executor.go

@@ -203,15 +203,31 @@ func loadProvider(pv provider.Provider) {
 }
 
 func loadRuleProvider(ruleProviders map[string]provider.RuleProvider) {
+	wg := sync.WaitGroup{}
 	for _, ruleProvider := range ruleProviders {
+		ruleProvider := ruleProvider
+		wg.Add(1)
+		go func() {
+			defer func() { wg.Done() }()
 			loadProvider(ruleProvider)
-	}
+		}()
 	}
 
-func loadProxyProvider(ruleProviders map[string]provider.ProxyProvider) {
-	for _, ruleProvider := range ruleProviders {
-		loadProvider(ruleProvider)
+	wg.Wait()
 }
+
+func loadProxyProvider(proxyProviders map[string]provider.ProxyProvider) {
+	wg := sync.WaitGroup{}
+	for _, proxyProvider := range proxyProviders {
+		proxyProvider := proxyProvider
+		wg.Add(1)
+		go func() {
+			defer func() { wg.Done() }()
+			loadProvider(proxyProvider)
+		}()
+	}
+
+	wg.Wait()
 }
 
 func updateTun(tun *config.Tun, dns *config.DNS) {