diff --git a/extra/benchmark/fib6/fib6.factor b/extra/benchmark/fib6/fib6.factor
new file mode 100755
index 0000000000..cc42028df6
--- /dev/null
+++ b/extra/benchmark/fib6/fib6.factor
@@ -0,0 +1,14 @@
+IN: benchmark.fib6
+USING: math kernel alien ;
+
+: fib
+    "int" { "int" } "cdecl" [
+        dup 1 <= [ drop 1 ] [
+            1- dup fib swap 1- fib +
+        ] if
+    ] alien-callback
+    "int" { "int" } "cdecl" alien-indirect ;
+
+: fib-main 25 fib drop ;
+
+MAIN: fib-main
diff --git a/extra/benchmark/sockets/sockets.factor b/extra/benchmark/sockets/sockets.factor
index 6b1908afb1..c739bb787c 100755
--- a/extra/benchmark/sockets/sockets.factor
+++ b/extra/benchmark/sockets/sockets.factor
@@ -1,32 +1,54 @@
-USING: io.sockets io.server io kernel math threads
-debugger tools.time prettyprint concurrency.combinators ;
+USING: io.sockets io kernel math threads
+debugger tools.time prettyprint concurrency.count-downs
+namespaces arrays continuations ;
 IN: benchmark.sockets
 
+SYMBOL: counter
+
+: number-of-requests 1 ;
+
+: server-addr "127.0.0.1" 7777 <inet4> ;
+
+: server-loop ( server -- )
+    dup accept [
+        [
+            read1 CHAR: x = [
+                "server" get dispose
+            ] [
+                number-of-requests
+                [ read1 write1 flush ] times
+                counter get count-down
+            ] if
+        ] with-stream
+    ] curry "Client handler" spawn drop server-loop ;
+
 : simple-server ( -- )
-    7777 local-server "benchmark.sockets" [
-        read1 CHAR: x = [
-            stop-server
-        ] [
-            20 [ read1 write1 flush ] times
-        ] if
-    ] with-server ;
+    [
+        server-addr <server> dup "server" set [
+            server-loop
+        ] with-disposal
+    ] ignore-errors ;
 
 : simple-client ( -- )
-    "localhost" 7777 <inet> <client> [
+    server-addr <client> [
         CHAR: b write1 flush
-        20 [ CHAR: a dup write1 flush read1 assert= ] times
+        number-of-requests
+        [ CHAR: a dup write1 flush read1 assert= ] times
+        counter get count-down
     ] with-stream ;
 
 : stop-server ( -- )
-    "localhost" 7777 <inet> <client> [
+    server-addr <client> [
         CHAR: x write1
     ] with-stream ;
 
 : clients ( n -- )
     dup pprint " clients: " write [
-        [ simple-server ] in-thread
+        dup 2 * <count-down> counter set
+        [ simple-server ] "Simple server" spawn drop
         yield yield
-        [ drop simple-client ] parallel-each
+        [ [ simple-client ] "Simple client" spawn drop ] times
+        counter get await
         stop-server
         yield yield
     ] time ;