diff --git a/core/leras/nn.py b/core/leras/nn.py
index 6504698..7d62393 100644
--- a/core/leras/nn.py
+++ b/core/leras/nn.py
@@ -70,19 +70,23 @@ class nn():
                         first_run = True
                     os.environ['CUDA_CACHE_PATH'] = str(compute_cache_path)
 
-            os.environ['CUDA_​CACHE_​MAXSIZE'] = '536870912' #512Mb (32mb default)
+            #nvcuda.dll ignores this param : os.environ['CUDA_​CACHE_​MAXSIZE'] = '536870912' #512Mb (32mb default)
             os.environ['TF_MIN_GPU_MULTIPROCESSOR_COUNT'] = '2'
-            os.environ['TF_CPP_MIN_LOG_LEVEL'] = '2' # tf log errors only
+            os.environ['TF_CPP_MIN_LOG_LEVEL'] = '3' # tf log errors only
 
             if first_run:
                 io.log_info("Caching GPU kernels...")
 
-            import tensorflow as tf
-            nn.tf = tf
+            #import tensorflow as tf
+            import tensorflow.compat.v1 as tf
             
             import logging
             # Disable tensorflow warnings
-            logging.getLogger('tensorflow').setLevel(logging.ERROR)
+            tf_logger = logging.getLogger('tensorflow')
+            tf_logger.setLevel(logging.ERROR)
+            
+            tf.disable_v2_behavior()
+            nn.tf = tf
 
             # Initialize framework
             import core.leras.ops
diff --git a/core/leras/ops/__init__.py b/core/leras/ops/__init__.py
index ddf1c06..443549a 100644
--- a/core/leras/ops/__init__.py
+++ b/core/leras/ops/__init__.py
@@ -333,7 +333,17 @@ def depth_to_space(x, size):
         x = tf.reshape(x, (-1, oh, ow, oc, ))
         return x
     else:
+        
+        b,c,h,w = x.shape.as_list()
+        oh, ow = h * size, w * size
+        oc = c // (size * size)
+
+        x = tf.reshape(x, (-1, size, size, oc, h, w, ) )
+        x = tf.transpose(x, (0, 3, 4, 1, 5, 2))
+        x = tf.reshape(x, (-1, oc, oh, ow))
+        return x
         return tf.depth_to_space(x, size, data_format=nn.data_format)
+        
 nn.depth_to_space = depth_to_space
 
 def rgb_to_lab(srgb):
diff --git a/core/mplib/MPSharedList.py b/core/mplib/MPSharedList.py
index 658f9fc..0b75b33 100644
--- a/core/mplib/MPSharedList.py
+++ b/core/mplib/MPSharedList.py
@@ -114,7 +114,7 @@ class ArrayFillerSubprocessor(Subprocessor):
     def __init__(self, sh_b, data_list ):
         self.sh_b = sh_b        
         self.data_list = data_list
-        super().__init__('ArrayFillerSubprocessor', ArrayFillerSubprocessor.Cli, 60)
+        super().__init__('ArrayFillerSubprocessor', ArrayFillerSubprocessor.Cli, 60, io_loop_sleep_time=0.001)
 
     #override
     def process_info_generator(self):
@@ -124,7 +124,7 @@ class ArrayFillerSubprocessor(Subprocessor):
     #override
     def get_data(self, host_dict):
         if len(self.data_list) > 0:
-            return self.data_list.pop(0)
+            return self.data_list.pop(-1)
 
         return None
 
diff --git a/project.code-workspace b/project.code-workspace
deleted file mode 100644
index 07fae2f..0000000
--- a/project.code-workspace
+++ /dev/null
@@ -1,50 +0,0 @@
-{
-	"folders": [
-		{
-			"path": "."
-		}
-	],
-	"settings": {
-        "workbench.colorTheme": "Visual Studio Light",
-        "diffEditor.ignoreTrimWhitespace": true,
-        "workbench.sideBar.location": "right",
-        "breadcrumbs.enabled": false,
-        "editor.renderWhitespace": "none",
-        "editor.minimap.enabled": false,
-        "workbench.activityBar.visible": true,
-        "window.menuBarVisibility": "default",
-        "editor.fastScrollSensitivity": 10,
-        "editor.mouseWheelScrollSensitivity": 2,
-        "window.zoomLevel": 0,
-        "extensions.ignoreRecommendations": true,
-        
-        "python.linting.pylintEnabled": false,
-        "python.linting.enabled": false,
-        "python.linting.pylamaEnabled": false,
-        "python.linting.pydocstyleEnabled": false,
-        "python.pythonPath": "${env:PYTHON_EXECUTABLE}",
-		"workbench.editor.tabCloseButton": "off",
-		"workbench.editor.tabSizing": "shrink",
-		"workbench.editor.highlightModifiedTabs": true,
-		"editor.mouseWheelScrollSensitivity": 3,
-		"editor.folding": false,
-		"editor.glyphMargin": false,
-		"files.exclude": {
-			"**/__pycache__": true,
-			"**/.github": true,
-			"**/.vscode": true,
-			"**/*.dat": true,
-			"**/*.h5": true,
-            "**/*.npy": true
-		},
-		"editor.quickSuggestions": {
-			"other": false,
-			"comments": false,
-			"strings": false
-			},
-			"editor.trimAutoWhitespace": false,
-			"python.linting.pylintArgs": [
-				"--disable=import-error"
-			]
-	}
-}
\ No newline at end of file
diff --git a/requirements-colab.txt b/requirements-colab.txt
index 128a518..5164319 100644
--- a/requirements-colab.txt
+++ b/requirements-colab.txt
@@ -6,4 +6,4 @@ ffmpeg-python==0.1.17
 scikit-image==0.14.2
 scipy==1.4.1
 colorama
-tensorflow-gpu==1.13.2
\ No newline at end of file
+tensorflow-gpu==2.4.0rc1
\ No newline at end of file
diff --git a/requirements-cuda.txt b/requirements-cuda.txt
index 8df3478..f626a14 100644
--- a/requirements-cuda.txt
+++ b/requirements-cuda.txt
@@ -7,5 +7,5 @@ scikit-image==0.14.2
 scipy==1.4.1
 colorama
 labelme==4.2.9
-tensorflow-gpu==1.13.2
+tensorflow-gpu==2.4.0rc1
 pyqt5
\ No newline at end of file