From 0478c0c2cd0eac688c5cce3f96604d2123bbd732 Mon Sep 17 00:00:00 2001
From: Kevin Burke <kev@inburke.com>
Date: Tue, 25 Nov 2014 15:42:33 -0800
Subject: [PATCH] Cache result of brew --prefix

brew --prefix runs Ruby, which is fairly expensive in system startup (somewhere
around 50-100 milliseconds on my machine). Instead of calling it twice, cache
the output and reuse it in the second command
---
 bin/autojump.zsh | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/bin/autojump.zsh b/bin/autojump.zsh
index fbc0960..ad1de57 100644
--- a/bin/autojump.zsh
+++ b/bin/autojump.zsh
@@ -10,8 +10,12 @@ fi
 
 
 # set homebrew installation paths
-if command -v brew &>/dev/null && [[ -d "$(brew --prefix)/share/zsh/site-functions" ]]; then
-    fpath=("$(brew --prefix)/share/zsh/site-functions" ${fpath})
+if command -v brew &>/dev/null; then
+    # Cache result of brew --prefix once because it is expensive.
+    local pfx=$(brew --prefix)
+    if [[ -d "$pfx/share/zsh/site-functions" ]]; then
+        fpath=("$pfx/share/zsh/site-functions" ${fpath})
+    fi
 fi