1 files changed, 6 insertions, 0 deletions
diff --git a/src/fastfield/delete.rs b/src/fastfield/delete.rs
index 15ed658..76ff7e4 100644
--- a/src/fastfield/delete.rs
+++ b/src/fastfield/delete.rs
@@ -2,6 +2,7 @@ use bit_set::BitSet;
 use common::HasLen;
 use directory::ReadOnlySource;
 use directory::WritePtr;
+use space_usage::ByteCount;
 use std::io;
 use std::io::Write;
 use DocId;
@@ -63,6 +64,11 @@ impl DeleteBitSet {
             b & (1u8 << shift) != 0
         }
     }
+
+    /// Summarize total space usage of this bitset.
+    pub fn space_usage(&self) -> ByteCount {
+        self.data.len()
+    }
 }
 
 impl HasLen for DeleteBitSet {