diff --git a/web/src/engine/predictive-text/worker-thread/src/main/correction/context-token.ts b/web/src/engine/predictive-text/worker-thread/src/main/correction/context-token.ts
index 198503d363..de715522e6 100644
--- a/web/src/engine/predictive-text/worker-thread/src/main/correction/context-token.ts
+++ b/web/src/engine/predictive-text/worker-thread/src/main/correction/context-token.ts
@@ -1,3 +1,11 @@
+/*
+ * Keyman is copyright (C) SIL Global. MIT License.
+ * 
+ * Created by jahorton on 2025-07-30
+ * 
+ * Represents cached data about one token (either a word or a unit of whitespace)
+ * in the context and associated correction-search progress and results.
+ */
 import { buildMergedTransform } from "@keymanapp/models-templates";
 import { SearchSpace } from "./distance-modeler.js";
 import { KMWString } from "@keymanapp/web-utils";
@@ -19,26 +27,11 @@ import Transform = LexicalModelTypes.Transform;
  * @param transformId
  * @returns
  */
-function textToCharTransforms(text: string, transformId?: number) {
-  let perCharTransforms: Transform[] = [];
-
-  for(let i=0; i < KMWString.length(text); i++) {
-    let char = KMWString.charAt(text, i); // is SMP-aware
-
-    let transform: Transform = {
-      insert: char,
-      deleteLeft: 0
-    };
-
-    if(transformId) {
-      transform.id = transformId
-    }
-
-    perCharTransforms.push(transform);
-  }
-
-  return perCharTransforms;
-}
+function textToCharTransforms(text: string, transformId?: number): Transform[] {
+  return transformId ?
+    [...text].map(insert => ({insert, deleteLeft: 0, id: transformId})) :
+    [...text].map(insert => ({insert, deleteLeft: 0}));
+}  
 
 /**
  * Represents cached data about one token (either a word or a unit of whitespace)