Fix to improve search result collection

Author: olivere

CONTRIBUTORS

@@ -32,6 +32,7 @@ arthurgustin [@arthurgustin](https://github.com/arthurgustin)
 Bas van Dijk [@basvandijk](https://github.com/basvandijk)
 Benjamin Fernandes [@LotharSee](https://github.com/LotharSee)
 Benjamin Zarzycki [@kf6nux](https://github.com/kf6nux)
+bestgopher [@bestgopher](https://github.com/bestgopher)
 Björn Gerdau [@kernle32dll](https://github.com/kernle32dll)
 Boris Popovschi [@Zyqsempai](https://github.com/Zyqsempai)
 Bowei Xu [@vancexu](https://github.com/vancexu)

search.go

@@ -691,7 +691,7 @@ func (r *SearchResult) Each(typ reflect.Type) []interface{} {
 	if r.Hits == nil || r.Hits.Hits == nil || len(r.Hits.Hits) == 0 {
 		return nil
 	}
-	var slice []interface{}
+	slice := make([]interface{}, 0, len(r.Hits.Hits))
 	for _, hit := range r.Hits.Hits {
 		v := reflect.New(typ).Elem()
 		if hit.Source == nil {