diff --git a/common/src/datetime.rs b/common/src/datetime.rs
index b818066aa..3d46882f9 100644
--- a/common/src/datetime.rs
+++ b/common/src/datetime.rs
@@ -29,7 +29,7 @@ pub enum DatePrecision {
 /// All constructors and conversions are provided as explicit
 /// functions and not by implementing any `From`/`Into` traits
 /// to prevent unintended usage.
-#[derive(Clone, Default, Copy, PartialEq, Eq, PartialOrd, Ord)]
+#[derive(Clone, Default, Copy, PartialEq, Eq, PartialOrd, Ord, Hash)]
 pub struct DateTime {
     // Timestamp in microseconds.
     pub(crate) timestamp_micros: i64,
diff --git a/src/core/segment_reader.rs b/src/core/segment_reader.rs
index 1b70e0cfb..1ed0a675b 100644
--- a/src/core/segment_reader.rs
+++ b/src/core/segment_reader.rs
@@ -38,7 +38,7 @@ pub struct SegmentReader {
     termdict_composite: CompositeFile,
     postings_composite: CompositeFile,
     positions_composite: CompositeFile,
-    fast_fields_readers: Arc<FastFieldReaders>,
+    fast_fields_readers: FastFieldReaders,
     fieldnorm_readers: FieldNormReaders,
 
     store_file: FileSlice,
@@ -167,7 +167,7 @@ impl SegmentReader {
         let schema = segment.schema();
 
         let fast_fields_data = segment.open_read(SegmentComponent::FastFields)?;
-        let fast_fields_readers = Arc::new(FastFieldReaders::open(fast_fields_data)?);
+        let fast_fields_readers = FastFieldReaders::open(fast_fields_data)?;
         let fieldnorm_data = segment.open_read(SegmentComponent::FieldNorms)?;
         let fieldnorm_readers = FieldNormReaders::open(fieldnorm_data)?;
 
diff --git a/src/indexer/json_term_writer.rs b/src/indexer/json_term_writer.rs
index 5be02d3a2..23dfcb251 100644
--- a/src/indexer/json_term_writer.rs
+++ b/src/indexer/json_term_writer.rs
@@ -366,7 +366,7 @@ impl<'a> JsonTermWriter<'a> {
         &self.term().value_bytes()[..end_of_path - 1]
     }
 
-    pub fn set_fast_value<T: FastValue>(&mut self, val: T) {
+    pub(crate) fn set_fast_value<T: FastValue>(&mut self, val: T) {
         self.close_path_and_set_type(T::to_type());
         let value = if T::to_type() == Type::Date {
             DateTime::from_u64(val.to_u64())
diff --git a/src/query/range_query/fast_field_range_query.rs b/src/query/range_query/fast_field_range_query.rs
index 06bab622d..c36a826aa 100644
--- a/src/query/range_query/fast_field_range_query.rs
+++ b/src/query/range_query/fast_field_range_query.rs
@@ -3,7 +3,6 @@ use std::ops::RangeInclusive;
 
 use columnar::Column;
 
-use crate::fastfield::MakeZero;
 use crate::{DocId, DocSet, TERMINATED};
 
 /// Helper to have a cursor over a vec of docids
@@ -40,7 +39,7 @@ impl VecCursor {
     }
 }
 
-pub(crate) struct RangeDocSet<T: MakeZero> {
+pub(crate) struct RangeDocSet<T> {
     /// The range filter on the values.
     value_range: RangeInclusive<T>,
     column: Column<T>,
@@ -61,7 +60,7 @@ pub(crate) struct RangeDocSet<T: MakeZero> {
 }
 
 const DEFAULT_FETCH_HORIZON: u32 = 128;
-impl<T: MakeZero + Send + Sync + PartialOrd + Copy + Debug + 'static> RangeDocSet<T> {
+impl<T: Send + Sync + PartialOrd + Copy + Debug + 'static> RangeDocSet<T> {
     pub(crate) fn new(value_range: RangeInclusive<T>, column: Column<T>) -> Self {
         let mut range_docset = Self {
             value_range,
@@ -131,7 +130,7 @@ impl<T: MakeZero + Send + Sync + PartialOrd + Copy + Debug + 'static> RangeDocSe
     }
 }
 
-impl<T: MakeZero + Send + Sync + PartialOrd + Copy + Debug + 'static> DocSet for RangeDocSet<T> {
+impl<T: Send + Sync + PartialOrd + Copy + Debug + 'static> DocSet for RangeDocSet<T> {
     #[inline]
     fn advance(&mut self) -> DocId {
         if let Some(docid) = self.loaded_docs.next() {
diff --git a/src/termdict/sstable_termdict/merger.rs b/src/termdict/sstable_termdict/merger.rs
index e502aeb4d..e98c29656 100644
--- a/src/termdict/sstable_termdict/merger.rs
+++ b/src/termdict/sstable_termdict/merger.rs
@@ -57,14 +57,6 @@ impl<'a> TermMerger<'a> {
         }
     }
 
-    pub(crate) fn matching_segments<'b: 'a>(
-        &'b self,
-    ) -> impl 'b + Iterator<Item = (usize, TermOrdinal)> {
-        self.current_streamers
-            .iter()
-            .map(|heap_item| (heap_item.segment_ord, heap_item.streamer.term_ord()))
-    }
-
     fn advance_segments(&mut self) {
         let streamers = &mut self.current_streamers;
         let heap = &mut self.heap;
@@ -80,19 +72,18 @@ impl<'a> TermMerger<'a> {
     /// False if there is none.
     pub fn advance(&mut self) -> bool {
         self.advance_segments();
-        if let Some(head) = self.heap.pop() {
-            self.current_streamers.push(head);
-            while let Some(next_streamer) = self.heap.peek() {
-                if self.current_streamers[0].streamer.key() != next_streamer.streamer.key() {
-                    break;
-                }
-                let next_heap_it = self.heap.pop().unwrap(); // safe : we peeked beforehand
-                self.current_streamers.push(next_heap_it);
+        let Some(head) = self.heap.pop() else {
+            return false;
+        };
+        self.current_streamers.push(head);
+        while let Some(next_streamer) = self.heap.peek() {
+            if self.current_streamers[0].streamer.key() != next_streamer.streamer.key() {
+                break;
             }
-            true
-        } else {
-            false
+            let next_heap_it = self.heap.pop().unwrap(); // safe : we peeked beforehand
+            self.current_streamers.push(next_heap_it);
         }
+        true
     }
 
     /// Returns the current term.