Load nvm async

Nvm was the slowest part of my prompt. Opening a new shell is super
quick now.

Reference: nvm-sh/nvm#539 (comment)

zsh/.zshrc

@@ -25,6 +25,23 @@ DEFAULT_USER="marcel"
 [ -f ~/.fzf.zsh ] && source ~/.fzf.zsh
 
 
+#
+# Load nvm
+#
+
+export NVM_DIR="$HOME/.nvm"
+
+# Async function
+function load_nvm() {
+	[ -s "$NVM_DIR/nvm.sh" ] && . "$NVM_DIR/nvm.sh"
+	[ -s "$NVM_DIR/bash_completion" ] && . "$NVM_DIR/bash_completion"
+}
+
+# Call `load_nvm` in async worker
+async_start_worker nvm_worker -n
+async_register_callback nvm_worker load_nvm
+async_job nvm_worker sleep 0.1
+
 # Up/down search for matches of what's already there
 autoload -Uz up-line-or-beginning-search down-line-or-beginning-search
 zle -N up-line-or-beginning-search
@@ -34,10 +51,4 @@ bindkey '^N' down-line-or-beginning-search
 bindkey '^[[A' up-line-or-beginning-search
 bindkey '^[[B' down-line-or-beginning-search
 
-export NVM_DIR="$HOME/.nvm"
-[ -s "$NVM_DIR/nvm.sh" ] && \. "$NVM_DIR/nvm.sh"  # This loads nvm
-[ -s "$NVM_DIR/bash_completion" ] && \. "$NVM_DIR/bash_completion"  # This loads nvm bash_completion
-
 bindkey -v
-[[ -s $HOME/.nvm/nvm.sh ]] && . $HOME/.nvm/nvm.sh
-