Pre-allocate mem for collectFields() method result slice

99designs · Apr 17, 2019 · 5dfa228 · 5dfa228
1 parent 88cdbdf
commit 5dfa228
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/graphql/exec.go b/graphql/exec.go
@@ -24,7 +24,7 @@ func CollectFields(ctx context.Context, selSet ast.SelectionSet, satisfies []str
 }
 
 func collectFields(reqCtx *RequestContext, selSet ast.SelectionSet, satisfies []string, visited map[string]bool) []CollectedField {
-	var groupedFields []CollectedField
+	groupedFields := make([]CollectedField, 0, len(selSet))
 
 	for _, sel := range selSet {
 		switch sel := sel.(type) {