topdown: Use json.Valid instead of util.UnmarshalJSON to avoid un…

…necessary allocations. (open-policy-agent#4203) Signed-off-by: Kristian Svalland <kristian.svalland@gmail.com>
justinlindh-wf · Jan 10, 2022 · 8b33bca · 8b33bca
1 parent 4985e4b
commit 8b33bca
Showing 1 changed file with 1 addition and 3 deletions.
diff --git a/topdown/encoding.go b/topdown/encoding.go
@@ -58,9 +58,7 @@ func builtinJSONIsValid(a ast.Value) (ast.Value, error) {
 		return nil, err
 	}
 
-	var x interface{}
-	err = util.UnmarshalJSON([]byte(str), &x)
-	return ast.Boolean(err == nil), nil
+	return ast.Boolean(json.Valid([]byte(str))), nil
 }
 
 func builtinBase64Encode(a ast.Value) (ast.Value, error) {