diff --git a/core/core.go b/core/core.go
index 3761a6c7..e265af6b 100644
--- a/core/core.go
+++ b/core/core.go
@@ -8,8 +8,8 @@ import (
 )
 
 func UniqueInts(a []int, sorted bool) []int {
-	tmp := make(map[int]bool)
-	uniq := make([]int, 0)
+	tmp := make(map[int]bool, len(a))
+	uniq := make([]int, 0, len(a))
 
 	for _, n := range a {
 		tmp[n] = true
diff --git a/modules/events_stream/trigger_list.go b/modules/events_stream/trigger_list.go
index aac8a176..9668b2b9 100644
--- a/modules/events_stream/trigger_list.go
+++ b/modules/events_stream/trigger_list.go
@@ -123,7 +123,12 @@ func (l *TriggerList) Dispatch(e session.Event) (ident string, cmd string, err e
 				if node := jsonquery.FindOne(doc, expr); node != nil {
 					cmd = strings.Replace(cmd, m, node.InnerText(), -1)
 				} else {
-					err = fmt.Errorf("error while parsing expressionfor trigger %s: '%s' doesn't resolve any object", tui.Bold(id), expr, expr, err)
+					err = fmt.Errorf(
+						"error while parsing expressionfor trigger %s: '%s' doesn't resolve any object: %v",
+						tui.Bold(id),
+						expr,
+						err,
+					)
 					return
 				}
 			}
diff --git a/modules/net_recon/net_show.go b/modules/net_recon/net_show.go
index 01c604a2..da4bcd34 100644
--- a/modules/net_recon/net_show.go
+++ b/modules/net_recon/net_show.go
@@ -15,7 +15,7 @@ import (
 	"github.com/evilsocket/islazy/tui"
 )
 
-var (
+const (
 	AliveTimeInterval      = time.Duration(10) * time.Second
 	PresentTimeInterval    = time.Duration(1) * time.Minute
 	JustJoinedTimeInterval = time.Duration(10) * time.Second
@@ -109,7 +109,7 @@ func (mod *Discovery) getRow(e *network.Endpoint, withMeta bool) [][]string {
 	})
 	sort.Strings(metas)
 
-	rows := [][]string{}
+	rows := make([][]string, 0, len(metas))
 	for i, m := range metas {
 		if i == 0 {
 			rows = append(rows, append(row, m))