Use the Dict.prototype.getRawEntries method more

This changes a number of loops currently using `Dict.prototype.{getKeys, getRaw}`, since it should be a tiny bit more efficient to use an iterator directly rather than first iterating through `Map`-keys to create a temporary `Array` that we finally iterate through at the call-site.

Note that the `getKeys` method is much older than `getRawEntries`, and originally the `Dict` class stored its data in a regular `Object`, hence why the old code was written that way.

src/core/annotation.js

@@ -2228,9 +2228,9 @@ class WidgetAnnotation extends Annotation {
     }
 
     const dict = new Dict(xref);
-    for (const key of originalDict.getKeys()) {
+    for (const [key, rawVal] of originalDict.getRawEntries()) {
       if (key !== "AP") {
-        dict.set(key, originalDict.getRaw(key));
+        dict.set(key, rawVal);
       }
     }
     if (flags !== undefined) {
@@ -2442,8 +2442,8 @@ class WidgetAnnotation extends Annotation {
 
       if (this._fieldResources.mergedResources.has("Font")) {
         const oldFont = this._fieldResources.mergedResources.get("Font");
-        for (const key of newFont.getKeys()) {
-          oldFont.set(key, newFont.getRaw(key));
+        for (const [key, rawVal] of newFont.getRawEntries()) {
+          oldFont.set(key, rawVal);
         }
       } else {
         this._fieldResources.mergedResources.set("Font", newFont);

src/core/core_utils.js

@@ -459,15 +459,14 @@ function collectActions(xref, dict, eventType) {
       if (!(additionalActions instanceof Dict)) {
         continue;
       }
-      for (const key of additionalActions.getKeys()) {
+      for (const [key, rawActionDict] of additionalActions.getRawEntries()) {
         const action = eventType[key];
         if (!action) {
           continue;
         }
-        const actionDict = additionalActions.getRaw(key);
         const parents = new RefSet();
         const list = [];
-        _collectJS(actionDict, xref, list, parents);
+        _collectJS(rawActionDict, xref, list, parents);
         if (list.length > 0) {
           actions[action] = list;
         }

src/core/primitives.js

@@ -312,8 +312,8 @@ class Dict {
 
   clone() {
     const dict = new Dict(this.xref);
-    for (const key of this.getKeys()) {
-      dict.set(key, this.getRaw(key));
+    for (const [key, rawVal] of this.getRawEntries()) {
+      dict.set(key, rawVal);
     }
     return dict;
   }