py/objstr: Optimise mp_obj_new_str_from_vstr for known-safe strings.
The new `mp_obj_new_str_from_utf8_vstr` can be used when you know you
already have a unicode-safe string.
Signed-off-by: Jim Mussared <jim.mussared@gmail.com>
diff --git a/py/modbuiltins.c b/py/modbuiltins.c
index 2459edd..f74db95 100644
--- a/py/modbuiltins.c
+++ b/py/modbuiltins.c
@@ -467,7 +467,7 @@
mp_print_t print;
vstr_init_print(&vstr, 16, &print);
mp_obj_print_helper(&print, o_in, PRINT_REPR);
- return mp_obj_new_str_from_vstr(&vstr);
+ return mp_obj_new_str_from_utf8_vstr(&vstr);
}
MP_DEFINE_CONST_FUN_OBJ_1(mp_builtin_repr_obj, mp_builtin_repr);