diff --git a/src/cpu_profile.cc b/src/cpu_profile.cc
index d2dd4ea..fb54da3 100644
--- a/src/cpu_profile.cc
+++ b/src/cpu_profile.cc
@@ -17,7 +17,7 @@ namespace nodex {
   using v8::Value;
 
   Nan::Persistent<ObjectTemplate> Profile::profile_template_;
-  Nan::Persistent<Array> Profile::profiles;
+  Nan::Persistent<Object> Profile::profiles;
   uint32_t Profile::uid_counter = 0;
 
   NAN_METHOD(Profile_EmptyMethod) {
@@ -36,19 +36,10 @@ namespace nodex {
   NAN_METHOD(Profile::Delete) {
     Local<Object> self = info.This();
     void* ptr = Nan::GetInternalFieldPointer(self, 0);
-    Local<Array> profiles = Nan::New<Array>(Profile::profiles);
-
-    uint32_t count = profiles->Length();
-    for (uint32_t index = 0; index < count; index++) {
-      if (profiles->Get(index) == info.This()) {
-        Local<Value> argv[2] = {
-          Nan::New<Integer>(index),
-          Nan::New<Integer>(1)
-        };
-        Local<Function>::Cast(profiles->Get(Nan::New<String>("splice").ToLocalChecked()))->Call(profiles, 2, argv);
-        break;
-      }
-    }
+    Local<Object> profiles = Nan::New<Object>(Profile::profiles);
+    Local<Value> _uid = info.This()->Get(Nan::New<String>("uid").ToLocalChecked());
+    Local<String> uid = Nan::To<String>(_uid).ToLocalChecked();
+    profiles->Delete(uid);
     static_cast<CpuProfile*>(ptr)->Delete();
   }
 
@@ -64,15 +55,19 @@ namespace nodex {
     Local<Object> profile = Nan::New(profile_template_)->NewInstance();
     Nan::SetInternalFieldPointer(profile, 0, const_cast<CpuProfile*>(node));
 
+    const uint32_t uid_length = (((sizeof uid_counter) * 8) + 2)/3 + 2;
+    char _uid[uid_length];
+    sprintf(_uid, "%d", uid_counter);
+
     Local<Value> CPU = Nan::New<String>("CPU").ToLocalChecked();
-    Local<Value> uid = Nan::New<Integer>(uid_counter);
+    Local<Value> uid = Nan::New<String>(_uid).ToLocalChecked();
 #if (NODE_MODULE_VERSION >= 45)
     Local<String> title = node->GetTitle();
 #else
     Local<String> title = Nan::New(node->GetTitle());
 #endif
     if (!title->Length()) {
-      char _title[32];
+      char _title[8 + uid_length];
       sprintf(_title, "Profile %i", uid_counter);
       title = Nan::New<String>(_title).ToLocalChecked();
     }
@@ -101,8 +96,8 @@ namespace nodex {
     profile->Set(Nan::New<String>("timestamps").ToLocalChecked(),  timestamps);
 #endif
 
-    Local<Array> profiles = Nan::New<Array>(Profile::profiles);
-    profiles->Set(profiles->Length(), profile);
+    Local<Object> profiles = Nan::New<Object>(Profile::profiles);
+    profiles->Set(uid, profile);
 
     return scope.Escape(profile);
   }
diff --git a/src/cpu_profile.h b/src/cpu_profile.h
index b6bc61d..2d10569 100644
--- a/src/cpu_profile.h
+++ b/src/cpu_profile.h
@@ -9,7 +9,7 @@ namespace nodex {
   class Profile {
    public:
     static v8::Local<v8::Value> New(const v8::CpuProfile* node);
-    static Nan::Persistent<v8::Array> profiles;
+    static Nan::Persistent<v8::Object> profiles;
    private:
     static NAN_METHOD(Delete);
     static void Initialize();
diff --git a/test/binding.js b/test/binding.js
index bcf5efb..e1b0e83 100644
--- a/test/binding.js
+++ b/test/binding.js
@@ -50,9 +50,9 @@ describe('binding', function() {
       it('should delete itself from profiler cache', function() {
         cpu.startProfiling('', true);
         var profile = cpu.stopProfiling();
-        var oldProfilesLength = cpu.profiles.length;
+        var oldProfilesLength = Object.keys(cpu.profiles).length;
         profile.delete();
-        expect(cpu.profiles.length == oldProfilesLength - 1).to.equal(true);
+        expect(oldProfilesLength - Object.keys(cpu.profiles).length).to.equal(1);
       });
     });
 
diff --git a/test/v8-profiler.js b/test/v8-profiler.js
index 825a7bc..ad21d16 100644
--- a/test/v8-profiler.js
+++ b/test/v8-profiler.js
@@ -18,7 +18,7 @@ describe('v8-profiler', function() {
       });
 
       it('should cache profiles', function() {
-        expect(profiler.profiles).to.have.length(1);
+        expect(Object.keys(profiler.profiles)).to.have.length(1);
       });
 
       it('should replace profile title, if started with name argument', function() {
@@ -73,8 +73,8 @@ describe('v8-profiler', function() {
     });
 
     function deleteAllProfiles() {
-      profiler.profiles.slice().forEach(function(profile) {
-        profile.delete();
+      Object.keys(profiler.profiles).forEach(function(key) {
+        profiler.profiles[key].delete();
       });
     }
   });
diff --git a/v8-profiler.js b/v8-profiler.js
index 2f6621d..56f0a9c 100644
--- a/v8-profiler.js
+++ b/v8-profiler.js
@@ -152,22 +152,6 @@ var profiler = {
     return snapshot;
   },
 
-  getSnapshot: function(index) {
-    var snapshot = binding.heap.snapshots[index];
-    if (!snapshot) return;
-    snapshot.__proto__ = Snapshot.prototype;
-    return snapshot;
-  },
-
-  findSnapshot: function(uid) {
-    var snapshot = binding.heap.snapshots.filter(function(snapshot) {
-      return snapshot.uid == uid;
-    })[0];
-    if (!snapshot) return;
-    snapshot.__proto__ = Snapshot.prototype;
-    return snapshot;
-  },
-
   deleteAllSnapshots: function () {
     Object.keys(binding.heap.snapshots).forEach(function(key) {
       binding.heap.snapshots[key].delete();
@@ -258,20 +242,9 @@ var profiler = {
     binding.cpu.setSamplingInterval(num);
   },
 
-  getProfile: function(index) {
-    return binding.cpu.profiles[index];
-  },
-
-  findProfile: function(uid) {
-    var profile = binding.cpu.profiles.filter(function(profile) {
-      return profile.uid == uid;
-    })[0];
-    return profile;
-  },
-
   deleteAllProfiles: function() {
-    binding.cpu.profiles.forEach(function(profile) {
-      profile.delete();
+    Object.keys(binding.cpu.profiles).forEach(function(key) {
+      binding.cpu.profiles[key].delete();
     });
   }
 };