Is prefix query is slow?

I am using prefix query and wildcard query but prefix query is taking to
much time compared to wildcard.

"query": {
"prefix": {
"Item.HinTitle.HindiTitlek": "क"
}

{

  • took: 2000
  • timed_out: false
  • _shards: {
    • total: 5
    • successful: 5
    • failed: 0
      }