diff --git a/src/reader.cpp b/src/reader.cpp
index 342a56e..11bc7a9 100644
--- a/src/reader.cpp
+++ b/src/reader.cpp
@@ -148,6 +148,7 @@ extern "C"{
 		unsigned int blocks_counter = 0;
 
 		while (!inFile.eof()){
+            PROFILER_BEGIN_BLOCK("Read block from file")
 			uint16_t sz = 0;
 			inFile.read((char*)&sz, sizeof(sz));
 			if (sz == 0)
@@ -176,6 +177,7 @@ extern "C"{
                 {
                     //auto lower = std::lower_bound(root.children.begin(), root.children.end(), tree);
                     /**/
+                    PROFILER_BEGIN_BLOCK("Find children")
                     auto rlower1 = ++root.children.rbegin();
                     for(; rlower1 != root.children.rend(); ++rlower1){
                         if(mt0 > rlower1->node->block()->getBegin())
@@ -190,6 +192,7 @@ extern "C"{
 
                     if (gather_statistics)
                     {
+                        PROFILER_BEGIN_BLOCK("Gather statistic for frame")
                         frame_statistics.clear();
 
                         //frame_statistics.reserve(tree.children.size());     // this gives slow-down on Windows
@@ -216,12 +219,13 @@ extern "C"{
 
             if (gather_statistics)
             {
+                PROFILER_BEGIN_BLOCK("Gather statistic")
                 BlocksTree& current = root.children.back();
                 update_statistics(overall_statistics, current.node, current.total_statistics);
             }
 
 		}
-
+        PROFILER_BEGIN_BLOCK("Gather statistic for roots")
 		if (gather_statistics)
 		{
 			for (auto& root : threaded_trees)
@@ -246,7 +250,7 @@ extern "C"{
                 root.second.total_children_number += static_cast<unsigned int>(root.second.children.size());
             }
         }
-
+        PROFILER_END_BLOCK
         // No need to delete BlockStatistics instances - they will be deleted on BlocksTree destructors
 
         return blocks_counter;