faster boot

modules/nixos/system/hw/boot/default.nix

@@ -2,7 +2,16 @@
 let isSANDBOX = builtins.elem config.syscfg.hostname [ "sandbox" ];
 in {
   config = lib.mkIf (!isSANDBOX) {
+    boot.kernelParams = [ 
+      "async_probe=tpm*"     # Load TPM in parallel without blocking udev
+      "8250.nr_uarts=0"      # Stop scanning for old motherboard serial lines (ttyS0-S3)
+    ];
+    boot.initrd = {
+      compressor = "zstd";
+      checkJournalingFS = false;
+    };
     boot.loader = {
+      timeout = 2;
       systemd-boot = {
         enable = true;
         configurationLimit = 8;