Improve zsh startup

Zsh/.zsh_completion

@@ -4,7 +4,16 @@ autoload -Uz add-zsh-hook
 
 if ! whence -w compdef >/dev/null 2>&1; then
     autoload -Uz compinit
-    compinit -i >/dev/null 2>&1
+    if [ -n "${ZSH_COMPDUMP:-}" ]; then
+        mkdir -p "${ZSH_COMPDUMP:h}"
+        if [ -f "$ZSH_COMPDUMP" ]; then
+            compinit -C -d "$ZSH_COMPDUMP" >/dev/null 2>&1
+        else
+            compinit -i -d "$ZSH_COMPDUMP" >/dev/null 2>&1
+        fi
+    else
+        compinit -i >/dev/null 2>&1
+    fi
 fi
 
 zmodload zsh/complist 2>/dev/null || true
@@ -12,6 +21,7 @@ zmodload zsh/complist 2>/dev/null || true
 zstyle ':completion:*' menu select
 zstyle ':completion:*' verbose yes
 zstyle ':completion:*' list-grouped yes
+zstyle ':completion:*' use-cache yes
 zstyle ':completion:*:descriptions' format '%F{240}%B%d%b%f'
 
 typeset -ga DOTZSH_USED_COMMANDS