diff --git a/src/core.js b/src/core.js
index 9b0f0530d..e6391610c 100644
--- a/src/core.js
+++ b/src/core.js
@@ -66,6 +66,10 @@ var Page = (function PageClosure() {
     this.pageDict = pageDict;
     this.xref = xref;
     this.ref = ref;
+    this.idCounters = {
+      font: 0,
+      obj: 0
+    };
   }
 
   Page.prototype = {
@@ -159,17 +163,19 @@ var Page = (function PageClosure() {
       var contentStreamPromise = pdfManager.ensure(this, 'getContentStream',
                                                    []);
       var resourcesPromise = pdfManager.ensure(this, 'resources');
+
+      var partialEvaluator = new PartialEvaluator(
+            pdfManager, this.xref, handler,
+            this.pageIndex, 'p' + this.pageIndex + '_',
+            this.idCounters);
+
       var dataPromises = Promise.all(
           [contentStreamPromise, resourcesPromise]);
       dataPromises.then(function(data) {
         var contentStream = data[0];
         var resources = data[1];
-        var pe = self.pe = new PartialEvaluator(
-                                  pdfManager,
-                                  self.xref, handler, self.pageIndex,
-                                  'p' + self.pageIndex + '_');
 
-        pdfManager.ensure(pe, 'getOperatorList',
+        pdfManager.ensure(partialEvaluator, 'getOperatorList',
                           [contentStream, resources]).then(
           function(opListPromise) {
             opListPromise.then(function(data) {
@@ -181,11 +187,7 @@ var Page = (function PageClosure() {
 
       pdfManager.ensure(this, 'getAnnotationsForDraw', []).then(
         function(annotations) {
-          var annotationEvaluator = new PartialEvaluator(
-            pdfManager, self.xref, handler, self.pageIndex,
-            'p' + self.pageIndex + '_annotation');
-
-          pdfManager.ensure(annotationEvaluator, 'getAnnotationsOperatorList',
+          pdfManager.ensure(partialEvaluator, 'getAnnotationsOperatorList',
                             [annotations]).then(
             function(opListPromise) {
               opListPromise.then(function(data) {
@@ -242,12 +244,13 @@ var Page = (function PageClosure() {
       dataPromises.then(function(data) {
         var contentStream = data[0];
         var resources = data[1];
-        var pe = new PartialEvaluator(
-                       pdfManager,
-                       self.xref, handler, self.pageIndex,
-                       'p' + self.pageIndex + '_');
+        var partialEvaluator = new PartialEvaluator(
+              pdfManager, self.xref, handler,
+              self.pageIndex, 'p' + self.pageIndex + '_',
+              self.idCounters);
 
-        pe.getTextContent(contentStream, resources).then(function(bidiTexts) {
+        partialEvaluator.getTextContent(
+            contentStream, resources).then(function(bidiTexts) {
           textContentPromise.resolve({
             bidiTexts: bidiTexts
           });
diff --git a/src/evaluator.js b/src/evaluator.js
index 3fcf03c30..1bd97650c 100644
--- a/src/evaluator.js
+++ b/src/evaluator.js
@@ -25,7 +25,7 @@
 
 var PartialEvaluator = (function PartialEvaluatorClosure() {
   function PartialEvaluator(pdfManager, xref, handler, pageIndex,
-                            uniquePrefix) {
+                            uniquePrefix, idCounters) {
     this.state = new EvalState();
     this.stateStack = [];
 
@@ -34,8 +34,7 @@ var PartialEvaluator = (function PartialEvaluatorClosure() {
     this.handler = handler;
     this.pageIndex = pageIndex;
     this.uniquePrefix = uniquePrefix;
-    this.objIdCounter = 0;
-    this.fontIdCounter = 0;
+    this.idCounters = idCounters;
   }
 
   // Specifies properties for each command
@@ -277,7 +276,7 @@ var PartialEvaluator = (function PartialEvaluatorClosure() {
       // If there is no imageMask, create the PDFImage and a lot
       // of image processing can be done here.
       var uniquePrefix = this.uniquePrefix || '';
-      var objId = 'img_' + uniquePrefix + (++this.objIdCounter);
+      var objId = 'img_' + uniquePrefix + (++this.idCounters.obj);
       dependencies[objId] = true;
       retData.args = [objId, w, h];
 
@@ -510,11 +509,11 @@ var PartialEvaluator = (function PartialEvaluatorClosure() {
 
       font = xref.fetchIfRef(font) || fontRes.get(fontName);
       if (!isDict(font)) {
-        ++this.fontIdCounter;
+        ++this.idCounters.font;
         promise.resolve({
           font: {
             translated: new ErrorFont('Font ' + fontName + ' is not available'),
-            loadedName: 'g_font_' + this.uniquePrefix + this.fontIdCounter
+            loadedName: 'g_font_' + this.uniquePrefix + this.idCounters.obj
           },
           dependencies: {}
         });
@@ -525,7 +524,7 @@ var PartialEvaluator = (function PartialEvaluatorClosure() {
       if (!loadedName) {
         // keep track of each font we translated so the caller can
         // load them asynchronously before calling display on a page
-        loadedName = 'g_font_' + this.uniquePrefix + (this.fontIdCounter + 1);
+        loadedName = 'g_font_' + this.uniquePrefix + (this.idCounters.font + 1);
         font.loadedName = loadedName;
 
         var translated;
@@ -575,7 +574,7 @@ var PartialEvaluator = (function PartialEvaluatorClosure() {
           });
         }
 
-        ++this.fontIdCounter;
+        ++this.idCounters.font;
       } else {
         promise.resolve({
           font: font,