[WIP] Update linter config + speed optimizations

internal/lib/collection.go

@@ -4,16 +4,18 @@ import (
 	"sync"
 )
 
-// Collection is sync.Map, that stores arbitrary data.
-type Collection struct {
-	items sync.Map
-	close chan struct{}
-}
+type (
+	// Collection is sync.Map, that stores arbitrary data.
+	Collection struct {
+		close chan struct{}
+		items sync.Map
+	}
 
-// Item just interface for stoing any data.
-type item struct {
-	data any
-}
+	// Item just interface for stoing any data.
+	item struct {
+		data any
+	}
+)
 
 // NewCollection creates new instance of "collection".
 func NewCollection() *Collection {
@@ -44,7 +46,7 @@ func (collection *Collection) Set(key any, value any) {
 	})
 }
 
-// Range apply function f to all keys/values in collection. Retuns immediatly on first error.
+// Range apply function f to all keys/values in collection. Returns immediately on first error.
 func (collection *Collection) Range(f func(key, value any) bool) {
 	fn := func(key, value any) bool {
 		item := value.(item)
@@ -63,6 +65,7 @@ func (collection *Collection) Delete(key any) {
 // Close frees memory occupied by collection and deletes collection itself.
 func (collection *Collection) Close() {
 	collection.close <- struct{}{}
+
 	collection.items = sync.Map{}
 }