# Bool filter vs query using query\_string in Lucene syntax

**URL:** <https://discuss.elastic.co/t/bool-filter-vs-query-using-query-string-in-lucene-syntax/137720>\
**Category:** Elasticsearch\
**Created:** [June 28, 2018, 2:58am UTC](https://discuss.elastic.co/t/bool-filter-vs-query-using-query-string-in-lucene-syntax/137720 "2018-06-28T02:58:23Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![smlbiobot](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/smlbiobot/32/29622_2.png) [@smlbiobot](https://discuss.elastic.co/u/smlbiobot)\
**Post date:** [June 28, 2018, 2:58am UTC](https://discuss.elastic.co/t/bool-filter-vs-query-using-query-string-in-lucene-syntax/137720/1 "2018-06-28T02:58:23Z")

</div>

Is there a performance difference between using these two queries, one using lucene syntax in `query_string`, and another writing out the filters directly?

```auto
{
    "query": {
        "bool": {
            "must_not": [
                {
                    "term": {
                        "team.cards.key.keyword": "giant"
                    }
                }
            ],
            "filter": [
                {
                    "query_string": {
                        "query": "gameMode.players.keyword:PvP AND team.cards.key.keyword:three-musketeers AND NOT team.cards.key.keyword:giant"
                    }
                }
            ]
        }
    }
}

```

```auto
{
    "query": {
        "bool": {
            "must_not": [
                {
                    "term": {
                        "team.cards.key.keyword": "giant"
                    }
                }
            ],
            "filter": [
                {
                    "term": {
                        "gameMode.players.keyword": "PvP"
                    }
                },
                {
                    "term": {
                        "team.cards.key.keyword": "three-musketeers"
                    }
                },
                {
                    "range": {
                        "timestamp": {
                            "gte": "now-7d/h",
                            "lte": "now/h",
                            "format": "epoch_millis"
                        }
                    }
                }
            ]
        }
    }
}

```

In dev environment, I can’t really see any performance differences but I am wondering if I will gain performance in production if I type it out in full as some of my searches appear to be a tad bit slow and I am wondering if this might be the cause.

---

<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [July 26, 2018, 2:58am UTC](https://discuss.elastic.co/t/bool-filter-vs-query-using-query-string-in-lucene-syntax/137720/2 "2018-07-26T02:58:31Z")

</div>

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