Tune compile performance: jobs=4, tmpfs=24G, add zoxide keyword

- Increase parallel emerge jobs from 2 to 4
- Increase portage tmpfs from 16G to 24G
- Add package.accept_keywords/zoxide (~amd64)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

etc/portage/make.conf

@@ -28,7 +28,7 @@ GENTOO_MIRRORS="https://distfiles.gentoo.org"
 
 # Features
 FEATURES="parallel-fetch ccache"
-EMERGE_DEFAULT_OPTS="--jobs=2 --verbose --keep-going=y"
+EMERGE_DEFAULT_OPTS="--jobs=4 --verbose --keep-going=y"
 PORTAGE_NICENESS=19
 PORTAGE_IONICE_COMMAND="ionice -c 3 -p \${PID}"
 

etc/portage/package.accept_keywords/zoxide

@@ -0,0 +1 @@
+app-shells/zoxide ~amd64

fstab.example

@@ -21,4 +21,4 @@ UUID=<UUID-btrfs>                          /.snapshots   btrfs   subvol=@snapsho
 # UUID=<UUID-drive2>                       /mnt/drive2   btrfs   compress=zstd,noatime                           0      0
 
 # Portage tmpfs (RAM-Disk for faster compiling - adjust size to your RAM)
-tmpfs                                      /var/tmp/portage  tmpfs  size=16G,uid=portage,gid=portage,mode=775,nosuid,noatime,nodev  0  0
+tmpfs                                      /var/tmp/portage  tmpfs  size=24G,uid=portage,gid=portage,mode=775,nosuid,noatime,nodev  0  0