rb_file_expand_path_fast  976 internal.h     VALUE rb_file_expand_path_fast(VALUE, VALUE);
rb_file_expand_path_fast   88 load.c         	expanded_path = rb_file_expand_path_fast(as_str, Qnil);
rb_file_expand_path_fast  535 load.c         	fullpath = rb_file_expand_path_fast(rb_get_path(rb_str_new2(feature)), Qnil);