use FxHashMap for Aggregations Request (#2722)

Co-authored-by: Pascal Seitz <[email protected]>

Author: PSeitz

src/aggregation/agg_req.rs

@@ -26,8 +26,9 @@
 //! let _agg_req: Aggregations = serde_json::from_str(elasticsearch_compatible_json_req).unwrap();
 //! ```
 
-use std::collections::{HashMap, HashSet};
+use std::collections::HashSet;
 
+use rustc_hash::FxHashMap;
 use serde::{Deserialize, Serialize};
 
 use super::bucket::{
@@ -43,7 +44,7 @@ use super::metric::{
 /// defined names. It is also used in buckets aggregations to define sub-aggregations.
 ///
 /// The key is the user defined name of the aggregation.
-pub type Aggregations = HashMap<String, Aggregation>;
+pub type Aggregations = FxHashMap<String, Aggregation>;
 
 /// Aggregation request.
 ///

src/aggregation/bucket/term_agg.rs

@@ -2362,7 +2362,8 @@ mod tests {
         let mut agg_res = search(&index, &agg_req)?;
 
         // --- Aggregations: terms on host and tags ---
-        let mut agg_req2: Aggregations = Aggregations::with_capacity(20);
+        let mut agg_req2: Aggregations =
+            Aggregations::with_capacity_and_hasher(20, Default::default());
         agg_req2.insert(
             "tags".to_string(),
             serde_json::from_value(json!({ "terms": { "field": "tags" } }))?,