diff --git a/src/conversion/chewing.rs b/src/conversion/chewing.rs
index 92c05fb4..d45e2bef 100644
--- a/src/conversion/chewing.rs
+++ b/src/conversion/chewing.rs
@@ -37,20 +37,25 @@ impl ChewingEngine {
                 .fold(vec![], |acc, interval| glue_fn(comp, acc, interval))
         };
         let fast_dp_clone = fast_dp.clone();
+        let mut cached_paths = None;
         let slow_search = iter::once_with(move || {
             if comp.is_empty() {
                 return vec![];
             }
-            let intervals = self.find_intervals(dict, comp);
-            let paths = self.find_k_paths(Self::MAX_OUT_PATHS, comp.len(), intervals);
-            trace!("paths: {:#?}", paths);
-            debug_assert!(!paths.is_empty());
-
-            let mut trimmed_paths = self.trim_paths(paths);
-            debug_assert!(!trimmed_paths.is_empty());
-
-            trimmed_paths.sort_by(|a, b| b.cmp(a));
-            trimmed_paths
+            cached_paths
+                .get_or_insert_with(|| {
+                    let intervals = self.find_intervals(dict, comp);
+                    let paths = self.find_k_paths(Self::MAX_OUT_PATHS, comp.len(), intervals);
+                    trace!("paths: {:#?}", paths);
+                    debug_assert!(!paths.is_empty());
+
+                    let mut trimmed_paths = self.trim_paths(paths);
+                    debug_assert!(!trimmed_paths.is_empty());
+
+                    trimmed_paths.sort_by(|a, b| b.cmp(a));
+                    trimmed_paths
+                })
+                .to_vec()
         })
         .flatten()
         .map(|p| {
diff --git a/src/editor/mod.rs b/src/editor/mod.rs
index 3ae98520..8a2984cd 100644
--- a/src/editor/mod.rs
+++ b/src/editor/mod.rs
@@ -506,11 +506,15 @@ impl SharedState {
         self.nth_conversion = 0;
     }
     fn conversion(&self) -> Vec<Interval> {
-        self.conv
-            .convert(&self.dict, self.com.as_ref())
-            .cycle()
-            .nth(self.nth_conversion)
-            .unwrap()
+        if self.nth_conversion > 0 {
+            let paths: Vec<_> = self.conv.convert(&self.dict, self.com.as_ref()).collect();
+            paths[self.nth_conversion % paths.len()].clone()
+        } else {
+            self.conv
+                .convert(&self.dict, self.com.as_ref())
+                .next()
+                .unwrap()
+        }
     }
     fn intervals(&self) -> impl Iterator<Item = Interval> {
         self.conversion().into_iter()