Why my search query is so slow...?

hi i developing server

this time we apply Atlas cluster and AtlasSearch

so need test Search

my code like this

func (m *MarketDB) Test() {
	text := "WROSship"

	pipeLine := []bson.M{
		{"$search": bson.M{
			"index": NFT_INDEX,
			"text": bson.M{
				"query": text,
				"path":  []string{"searchKeyword"},
			},
		}},
	}

	ctx := context.Background()
	if cursor, err := m.nfts.Aggregate(ctx, pipeLine, options.Aggregate()); err != nil {
		panic(err)
	} else {
		defer cursor.Close(ctx)

		var nfts []*types.Nft

		if err = cursor.All(ctx, &nfts); err != nil {
			panic(err)
		} else {
			fmt.Println(len(nfts))
		}
	}
}

nfts collection’s total Document is 13M
and that query result count is 35000

but it takes 30s

what is my fault??
my search index like this

{
  "mappings": {
    "dynamic": false,
    "fields": {
      "searchKeyword": {
        "analyzer": "lucene.standard",
        "type": "string"
      }
    }
  }
}

and searchKeyword like this

WM4CHA 1285 0xc234e58cb077ccf4fbe57d3ac27db0d1cdfe0473 Taoist

thank to read

Hi @_WM2 are you looking for an exact match in your queries?

If so there are a few strategies to achieve this which could be worth testing.