diff --git a/package.json b/package.json
index fee05cfae0..37e6ec2232 100644
--- a/package.json
+++ b/package.json
@@ -4,7 +4,7 @@
   "url": "http://github.com/mapnik/node-mapnik",
   "homepage": "http://mapnik.org",
   "author": "Dane Springmeyer <dane@mapbox.com> (mapnik.org)",
-  "version": "4.5.2",
+  "version": "4.5.2-exp2",
   "mapnik_version": "26d3084ea",
   "main": "./lib/mapnik.js",
   "binary": {
diff --git a/src/blend.cpp b/src/blend.cpp
index db6cf626e2..84eb5de9c1 100644
--- a/src/blend.cpp
+++ b/src/blend.cpp
@@ -473,14 +473,14 @@ struct AsyncBlend : Napi::AsyncWorker
             std::string & str = *output_buffer_;
             auto buffer = Napi::Buffer<char>::New(env, &str[0], str.size(),
                                                   [](Napi::Env env_, char* /*unused*/, std::string * str_ptr) {
-                                                      if (str_ptr != nullptr) {
-                                                          Napi::MemoryManagement::AdjustExternalMemory
-                                                              (env_, -static_cast<std::int64_t>(str_ptr->size()));
-                                                      }
+                                                      //if (str_ptr != nullptr) {
+                                                      //    Napi::MemoryManagement::AdjustExternalMemory
+                                                      //        (env_, -static_cast<std::int64_t>(str_ptr->size()));
+                                                      //}
                                                       delete str_ptr;
                                                   },
                                                   output_buffer_.release());
-            Napi::MemoryManagement::AdjustExternalMemory(env, static_cast<std::int64_t>(str.size()));
+            //Napi::MemoryManagement::AdjustExternalMemory(env, static_cast<std::int64_t>(str.size()));
             return {env.Null(), buffer};
         }
         return Base::GetResult(env);
diff --git a/src/mapnik_image_encode.cpp b/src/mapnik_image_encode.cpp
index 7f406aa0f0..22fc814588 100644
--- a/src/mapnik_image_encode.cpp
+++ b/src/mapnik_image_encode.cpp
@@ -81,14 +81,14 @@ struct AsyncEncode : Napi::AsyncWorker
             std::string & str = *result_;
             auto buffer = Napi::Buffer<char>::New(env, &str[0], str.size(),
                                                   [](Napi::Env env_, char* /*unused*/, std::string * str_ptr) {
-                                                      if (str_ptr != nullptr) {
-                                                          Napi::MemoryManagement::AdjustExternalMemory
-                                                              (env_, -static_cast<std::int64_t>(str_ptr->size()));
-                                                      }
+                                                      //if (str_ptr != nullptr) {
+                                                      //    Napi::MemoryManagement::AdjustExternalMemory
+                                                      //        (env_, -static_cast<std::int64_t>(str_ptr->size()));
+                                                      //}
                                                       delete str_ptr;
                                                   },
                                                   result_.release());
-            Napi::MemoryManagement::AdjustExternalMemory(env, static_cast<std::int64_t>(str.size()));
+            //Napi::MemoryManagement::AdjustExternalMemory(env, static_cast<std::int64_t>(str.size()));
             return {env.Null(), buffer};
         }
         return Base::GetResult(env);
@@ -133,14 +133,14 @@ Napi::Value Image::encodeSync(Napi::CallbackInfo const& info)
         std::string & str = *result;
         auto buffer = Napi::Buffer<char>::New(env, &str[0], str.size(),
                                               [](Napi::Env env_, char* /*unused*/, std::string * str_ptr) {
-                                                  if (str_ptr != nullptr) {
-                                                      Napi::MemoryManagement::AdjustExternalMemory
-                                                          (env_, -static_cast<std::int64_t>(str_ptr->size()));
-                                                  }
+                                                  //if (str_ptr != nullptr) {
+                                                  //    Napi::MemoryManagement::AdjustExternalMemory
+                                                  //        (env_, -static_cast<std::int64_t>(str_ptr->size()));
+                                                  //}
                                                   delete str_ptr;
                                               },
                                               result.release());
-        Napi::MemoryManagement::AdjustExternalMemory(env, static_cast<std::int64_t>(str.size()));
+        //Napi::MemoryManagement::AdjustExternalMemory(env, static_cast<std::int64_t>(str.size()));
         return scope.Escape(buffer);
     }
     catch (std::exception const& ex)
diff --git a/src/mapnik_image_view.cpp b/src/mapnik_image_view.cpp
index 310e8e53c4..265d5e5537 100644
--- a/src/mapnik_image_view.cpp
+++ b/src/mapnik_image_view.cpp
@@ -293,14 +293,14 @@ struct AsyncEncode : Napi::AsyncWorker
             std::string & str = *result_;
             auto buffer = Napi::Buffer<char>::New(env, &str[0], str.size(),
                                                   [](Napi::Env env_, char* /*unused*/, std::string * str_ptr) {
-                                                      if (str_ptr != nullptr) {
-                                                          Napi::MemoryManagement::AdjustExternalMemory
-                                                              (env_, -static_cast<std::int64_t>(str_ptr->size()));
-                                                      }
+                                                      //if (str_ptr != nullptr) {
+                                                      //    Napi::MemoryManagement::AdjustExternalMemory
+                                                      //        (env_, -static_cast<std::int64_t>(str_ptr->size()));
+                                                      //}
                                                       delete str_ptr;
                                                   },
                                                   result_.release());
-            Napi::MemoryManagement::AdjustExternalMemory(env, static_cast<std::int64_t>(str.size()));
+            //Napi::MemoryManagement::AdjustExternalMemory(env, static_cast<std::int64_t>(str.size()));
             return {env.Null(), buffer};
         }
         return Base::GetResult(env);
@@ -330,14 +330,14 @@ Napi::Value ImageView::encodeSync(Napi::CallbackInfo const& info)
         std::string & str = *result;
         auto buffer = Napi::Buffer<char>::New(env, &str[0], str.size(),
                                               [](Napi::Env env_, char* /*unused*/, std::string * str_ptr) {
-                                                  if (str_ptr != nullptr) {
-                                                      Napi::MemoryManagement::AdjustExternalMemory
-                                                          (env_, -static_cast<std::int64_t>(str_ptr->size()));
-                                                  }
+                                                  //if (str_ptr != nullptr) {
+                                                  //    Napi::MemoryManagement::AdjustExternalMemory
+                                                  //        (env_, -static_cast<std::int64_t>(str_ptr->size()));
+                                                  //}
                                                   delete str_ptr;
                                               },
                                               result.release());
-        Napi::MemoryManagement::AdjustExternalMemory(env, static_cast<std::int64_t>(str.size()));
+        //Napi::MemoryManagement::AdjustExternalMemory(env, static_cast<std::int64_t>(str.size()));
         return scope.Escape(buffer);
     }
     catch (std::exception const& ex)
diff --git a/src/mapnik_vector_tile_data.cpp b/src/mapnik_vector_tile_data.cpp
index 52a7e3ce04..08c28938d8 100644
--- a/src/mapnik_vector_tile_data.cpp
+++ b/src/mapnik_vector_tile_data.cpp
@@ -100,13 +100,13 @@ struct AsyncGetData : Napi::AsyncWorker
                 &data[0],
                 data.size(),
                 [](Napi::Env env_, char* /*unused*/, std::string* str_ptr) {
-                    if (str_ptr != nullptr) {
-                        Napi::MemoryManagement::AdjustExternalMemory(env_, -static_cast<std::int64_t>(str_ptr->size()));
-                    }
+                    //if (str_ptr != nullptr) {
+                        //Napi::MemoryManagement::AdjustExternalMemory(env_, -static_cast<std::int64_t>(str_ptr->size()));
+                    //}
                     delete str_ptr;
                 },
                 data_.release());
-            Napi::MemoryManagement::AdjustExternalMemory(env, static_cast<std::int64_t>(data.size()));
+            //Napi::MemoryManagement::AdjustExternalMemory(env, static_cast<std::int64_t>(data.size()));
             return {env.Undefined(), buffer};
         }
         else
@@ -120,13 +120,13 @@ struct AsyncGetData : Napi::AsyncWorker
                     &data[0],
                     data.size(),
                     [](Napi::Env env_, char* /*unused*/, std::string* str_ptr) {
-                        if (str_ptr != nullptr) {
-                            Napi::MemoryManagement::AdjustExternalMemory(env_, -static_cast<std::int64_t>(str_ptr->size()));
-                        }
+                        //if (str_ptr != nullptr) {
+                        //    Napi::MemoryManagement::AdjustExternalMemory(env_, -static_cast<std::int64_t>(str_ptr->size()));
+                        // }
                         delete str_ptr;
                     },
                     ptr.release());
-                Napi::MemoryManagement::AdjustExternalMemory(env, static_cast<std::int64_t>(data.size()));
+                //Napi::MemoryManagement::AdjustExternalMemory(env, static_cast<std::int64_t>(data.size()));
                 return {env.Undefined(), buffer};
             }
             else
@@ -505,13 +505,13 @@ Napi::Value VectorTile::getDataSync(Napi::CallbackInfo const& info)
                         &data[0],
                         data.size(),
                         [](Napi::Env env_, char* /*unused*/, std::string* str_ptr) {
-                            if (str_ptr != nullptr) {
-                                Napi::MemoryManagement::AdjustExternalMemory(env_, -static_cast<std::int64_t>(str_ptr->size()));
-                            }
+                            //if (str_ptr != nullptr) {
+                            //    Napi::MemoryManagement::AdjustExternalMemory(env_, -static_cast<std::int64_t>(str_ptr->size()));
+                            //}
                             delete str_ptr;
                         },
                         ptr.release());
-                    Napi::MemoryManagement::AdjustExternalMemory(env, static_cast<std::int64_t>(data.size()));
+                    //Napi::MemoryManagement::AdjustExternalMemory(env, static_cast<std::int64_t>(data.size()));
                     return scope.Escape(buffer);
                 }
                 else
@@ -535,13 +535,13 @@ Napi::Value VectorTile::getDataSync(Napi::CallbackInfo const& info)
                     &data[0],
                     data.size(),
                     [](Napi::Env env_, char* /*unused*/, std::string* str_ptr) {
-                        if (str_ptr != nullptr) {
-                            Napi::MemoryManagement::AdjustExternalMemory(env_, -static_cast<std::int64_t>(str_ptr->size()));
-                        }
+                        //if (str_ptr != nullptr) {
+                        //    Napi::MemoryManagement::AdjustExternalMemory(env_, -static_cast<std::int64_t>(str_ptr->size()));
+                        //}
                         delete str_ptr;
                     },
                     compressed.release());
-                Napi::MemoryManagement::AdjustExternalMemory(env, static_cast<std::int64_t>(data.size()));
+                //Napi::MemoryManagement::AdjustExternalMemory(env, static_cast<std::int64_t>(data.size()));
                 return scope.Escape(buffer);
             }
         }