diff --git a/apier/v1/apier.go b/apier/v1/apier.go
index fe83aafb1..0a04b5f08 100644
--- a/apier/v1/apier.go
+++ b/apier/v1/apier.go
@@ -22,7 +22,6 @@ import (
 	"encoding/json"
 	"errors"
 	"fmt"
-	"log"
 	"path"
 
 	"github.com/cgrates/cgrates/cache2go"
@@ -793,11 +792,9 @@ func (self *ApierV1) ReloadCache(attrs utils.ApiReloadCache, reply *string) erro
 			dcsKeys[idx] = engine.DERIVEDCHARGERS_PREFIX + dc
 		}
 	}
-	log.Print("Cache Rating")
 	if err := self.RatingDb.CacheRating(dstKeys, rpKeys, rpfKeys, rpAlsKeys, lcrKeys); err != nil {
 		return err
 	}
-	log.Print("Cache Accounting")
 	if err := self.AccountDb.CacheAccounting(actKeys, shgKeys, accAlsKeys, dcsKeys); err != nil {
 		return err
 	}
diff --git a/engine/destinations.go b/engine/destinations.go
index 993ff301f..770f7354b 100644
--- a/engine/destinations.go
+++ b/engine/destinations.go
@@ -91,10 +91,9 @@ func CleanStalePrefixes(destIds []string) {
 	}
 	for prefix, idIDs := range prefixMap {
 		dIDs := idIDs.Value().([]interface{})
-		strdIDs := utils.ConvertInterfaceSliceToStringMap(dIDs)
 		changed := false
 		for _, searchedDID := range destIds {
-			if i, found := strdIDs[searchedDID]; found {
+			if i, found := utils.GetSliceInterfaceIndex(dIDs, searchedDID); found {
 				if len(dIDs) == 1 {
 					// remove de prefix from cache
 					cache2go.RemKey(DESTINATION_PREFIX + prefix)
diff --git a/utils/slice.go b/utils/slice.go
index bec15c525..1e1bb7879 100644
--- a/utils/slice.go
+++ b/utils/slice.go
@@ -52,10 +52,18 @@ func SliceMemberHasPrefix(ss []string, prfx string) bool {
 	return false
 }
 
-func ConvertInterfaceSliceToStringMap(is []interface{}) (result map[string]int) {
-	result = make(map[string]int)
-	for index, i := range is {
-		result[i.(string)] = index
+type InterfaceStrings []interface{}
+
+func (a InterfaceStrings) Len() int           { return len(a) }
+func (a InterfaceStrings) Swap(i, j int)      { a[i], a[j] = a[j], a[i] }
+func (a InterfaceStrings) Less(i, j int) bool { return a[i].(string) < a[j].(string) }
+
+// Binary string search in slice
+// returns true if found and the index
+func GetSliceInterfaceIndex(ss []interface{}, s interface{}) (int, bool) {
+	sort.Sort(InterfaceStrings(ss))
+	if i := sort.Search(len(ss), func(i int) bool { return ss[i].(string) >= s.(string) }); i < len(ss) && ss[i] == s {
+		return i, true
 	}
-	return result
+	return len(ss), false
 }