message: test: skip-list test consumes too much time
diff: @@ -1169,7 +1169,7 @@ mod tests {
  use ckb_core::header::HeaderBuilder;
  use rand::{thread_rng, Rng};
  - const SKIPLIST_LENGTH: u64 = 500_000;
  + const SKIPLIST_LENGTH: u64 = 10_000;
  #[test]
  fn test_get_ancestor_use_skip_list() {
  @@ -1222,7 +1222,7 @@ mod tests {
  header
  };
  - for _ in 0..1000 {
  + for _ in 0..100 {
  let from: u64 = rng.gen_range(0, SKIPLIST_LENGTH);
  let to: u64 = rng.gen_range(0, from);
  let view_from = &header_map[&hashes[&from]];
  