`test -n` seems to read the whole string. For performance issues we just analyze the first line by stripping the output of cat to the first line with `sed q`.

1 files changed, 1 insertions, 1 deletions

diff --git a/powerlevel9k.zsh-theme b/powerlevel9k.zsh-theme
index 4982d5ae..a60114bc 100644
--- a/powerlevel9k.zsh-theme
+++ b/powerlevel9k.zsh-theme
@@ -337,7 +337,7 @@ prompt_vcs() {
 
 function +vi-git-untracked() {
     if [[ $(git rev-parse --is-inside-work-tree 2> /dev/null) == 'true' && \
-            -n $(git ls-files --others --exclude-standard) ]]; then
+            -n $(git ls-files --others --exclude-standard | sed q) ]]; then
         hook_com[unstaged]+=" %F{$VCS_FOREGROUND_COLOR}$VCS_UNTRACKED_ICON%f"
     fi
 }