diff --git a/common/packages.nix b/common/packages.nix
index fd3d8e3..161eabd 100644
--- a/common/packages.nix
+++ b/common/packages.nix
@@ -99,6 +99,7 @@ in
         bandwhich
         dnsutils
         gping
+        iperf
         nmap
         openssl
         openvpn
diff --git a/modules/darwin/preferences.nix b/modules/darwin/preferences.nix
index ae47269..56bcb85 100644
--- a/modules/darwin/preferences.nix
+++ b/modules/darwin/preferences.nix
@@ -46,9 +46,9 @@
       "com.apple.sound.beep.volume" = "0.000";
       ApplePressAndHoldEnabled = false;
       # delay before repeating keystrokes
-      InitialKeyRepeat = 10;
+      InitialKeyRepeat = 15;
       # delay between repeated keystrokes upon holding a key
-      KeyRepeat = 1;
+      KeyRepeat = 5;
       AppleShowAllExtensions = true;
       AppleShowScrollBars = "Automatic";
     };