diff --git a/build.sh b/build.sh
index c6f149c..3bd6c39 100755
--- a/build.sh
+++ b/build.sh
@@ -18,13 +18,13 @@ time clang++ -D_DEBUG -D_DONT_BREAK_ON_ERRORS \
      src/main.cpp -gfull -gdwarf -o ./bin/slime_d --std=c++17 \
      -I3rd/ || exit 1
 
-# echo ""
-# echo "--------------------------------"
-# echo " compiling fullslime  (release) "
-# echo "--------------------------------"
-# time clang++ -D_DONT_BREAK_ON_ERRORS -O3  \
-#      src/main.cpp -g -o ./bin/slime --std=c++17 \
-#      -I3rd/ || exit 1
+echo ""
+echo "--------------------------------"
+echo " compiling fullslime  (release) "
+echo "--------------------------------"
+time clang++ -D_DONT_BREAK_ON_ERRORS -O3  \
+     src/main.cpp -g -o ./bin/slime --std=c++17 \
+     -I3rd/ || exit 1
 
 echo ""
 echo "------------------------------"
diff --git a/src/built_ins.cpp b/src/built_ins.cpp
index f010ff9..f353f54 100644
--- a/src/built_ins.cpp
+++ b/src/built_ins.cpp
@@ -1319,7 +1319,9 @@ namespace Slime {
             // example, numbers are not valid symbols.
 
             try assert_type(str, Lisp_Object_Type::String);
-            return Memory::get_symbol(Memory::duplicate_string(str->value.string));
+            // TODO(Felix): It was like this: why did we have to copy it?
+            // return Memory::get_symbol(Memory::duplicate_string(str->value.string));
+            return Memory::get_symbol(str->value.string);
         };
         define((concat-strings . strings), "TODO") {
             profile_with_name("(concat-strings)");
diff --git a/src/eval.cpp b/src/eval.cpp
index 37e19a5..fbf7cb0 100644
--- a/src/eval.cpp
+++ b/src/eval.cpp
@@ -445,6 +445,9 @@ namespace Slime {
                     Globals::Current_Execution.cs.clear();
                     Globals::Current_Execution.ams.clear();
                     Globals::Current_Execution.pcs.clear();
+                    for (auto it: Globals::Current_Execution.nass) {
+                        it.dealloc();
+                    }
                     Globals::Current_Execution.nass.clear();
                     Globals::Current_Execution.envi_stack.clear();
                     Globals::Current_Execution.ats.clear();
diff --git a/src/memory.cpp b/src/memory.cpp
index daf4617..115d384 100644
--- a/src/memory.cpp
+++ b/src/memory.cpp
@@ -100,6 +100,20 @@ namespace Slime::Memory {
     proc free_everything() -> void {
         object_memory.for_each([](Lisp_Object* lo){
             switch (lo->type) {
+            case Lisp_Object_Type::Continuation: {
+                lo->value.continuation->cs.dealloc();
+                lo->value.continuation->pcs.dealloc();
+                lo->value.continuation->ams.dealloc();
+                lo->value.continuation->ats.dealloc();
+                lo->value.continuation->mes.dealloc();
+                lo->value.continuation->envi_stack.dealloc();
+                for (auto it : lo->value.continuation->nass) {
+                    it.dealloc();
+                }
+                lo->value.continuation->nass.dealloc();
+                free(lo->value.continuation);
+
+            } break;
             case Lisp_Object_Type::Function: {
                 lo->value.function->args.positional.symbols.dealloc();
                 lo->value.function->args.keyword.keywords.dealloc();
@@ -140,6 +154,9 @@ namespace Slime::Memory {
         Globals::Current_Execution.ams.dealloc();
         Globals::Current_Execution.pcs.dealloc();
         Globals::Current_Execution.nass.dealloc();
+        for (auto it: Globals::Current_Execution.nass) {
+            it.dealloc();
+        }
         Globals::Current_Execution.ats.dealloc();
         Globals::Current_Execution.mes.dealloc();
 
@@ -278,24 +295,28 @@ namespace Slime::Memory {
         return node;
     }
 
+    inline proc full_clone_continuation(Continuation* c) -> Continuation* {
+        Continuation* res = (Continuation*)malloc(sizeof(Continuation));
+        res->cs         = c->cs.clone();
+        res->pcs        = c->pcs.clone();
+        res->ams        = c->ams.clone();
+        res->ats        = c->ats.clone();
+        res->mes        = c->mes.clone();
+        res->envi_stack = c->envi_stack.clone();
+        res->nass       = c->nass.clone();
+
+        for (u32 i = 0; i < res->nass.next_index; ++i) {
+            res->nass.data[i] = c->nass.data[i].clone();
+        }
+
+        return res;
+    }
 
     proc create_lisp_object_continuation() -> Lisp_Object* {
-        using Globals::Current_Execution;
         Lisp_Object* node;
         try node = create_lisp_object();
         node->type = Lisp_Object_Type::Continuation;
-        node->value.continuation = (Continuation*)malloc(sizeof(Continuation));
-        node->value.continuation->cs = Current_Execution.cs.clone();
-        node->value.continuation->pcs = Current_Execution.pcs.clone();
-        node->value.continuation->ams = Current_Execution.ams.clone();
-        node->value.continuation->ats = Current_Execution.ats.clone();
-        node->value.continuation->mes = Current_Execution.mes.clone();
-        node->value.continuation->envi_stack = Current_Execution.envi_stack.clone();
-
-        node->value.continuation->nass = Current_Execution.nass.clone();
-        for (u32 i = 0; i < node->value.continuation->nass.next_index; ++i) {
-            node->value.continuation->nass.data[i] = node->value.continuation->nass.data[i].clone();
-        }
+        node->value.continuation = full_clone_continuation(&Globals::Current_Execution);
         return node;
     }
 
@@ -454,25 +475,32 @@ namespace Slime::Memory {
         if (n == Memory::nil || n == Memory::t) {
             return n;
         } else {
-            Lisp_Object_Type type = n->type;
-            if (type == Lisp_Object_Type::Symbol  ||
-                type == Lisp_Object_Type::Keyword ||
-                type == Lisp_Object_Type::Function)
-            {
+            switch(n->type) {
+            case Lisp_Object_Type::Symbol:
+            case Lisp_Object_Type::Keyword:
+            case Lisp_Object_Type::Function:
                 return n;
-            } else if (type == Lisp_Object_Type::String) {
+            case Lisp_Object_Type::String: {
                 Lisp_Object* target;
                 try target = create_lisp_object();
                 *target = *n;
                 target->value.string = create_string(target->value.string.data);
                 return target;
-            } else {
+            }
+            case Lisp_Object_Type::Continuation:
+                Lisp_Object* target;
+                try target = create_lisp_object();
+                *target = *n;
+                target->value.continuation = full_clone_continuation(n->value.continuation);
+                return target;
+            default: {
                 Lisp_Object* target;
                 try target = create_lisp_object();
                 *target = *n;
 
                 return target;
             }
+            }
         }
     }