First time query with different params is taking a lot of time

Elastic Stack Elasticsearch
4

Am using some analysers and ngram filters for some fields

                          "filter": {
                              "nGram_filter": {
                                 "type": "edge_ngram",
                                 "min_gram": 3,
                                 "max_gram": 6,
                                 "token_chars": [
                                    "letter",
                                    "digit",
                                    "punctuation",
                                    "symbol"
                                 ]
                              }
                           },
                          "analyzer": {
                              "custom_analyser": {
                                  "tokenizer": "standard",
                                  "filter": ["standard", "lowercase", "stop", "porter_stem"]
                              },
                              "nGram_analyzer": {
                                  "type": "custom",
                                  "tokenizer": "standard",
                                  "filter": [
                                     "lowercase",
                                     "nGram_filter",
                                     "stop",
                                     "porter_stem"
                                  ]
                               },
                               "whitespace_analyzer": {
                                  "type": "custom",
                                  "tokenizer": "standard",
                                  "filter": [
                                     "standard",
                                     "lowercase",
                                     "stop",
                                     "porter_stem"
                                  ]
                               }            
                        },
                  ```