From ac9543d9017fbb56e670c0728173432a879d4d13 Mon Sep 17 00:00:00 2001
From: Stephen Blott
Date: Sat, 9 Apr 2016 06:32:51 +0100
Subject: Minor performance tweak.

Two minor tweaks:

1. Do not use ".indexOf()" three times for each comparison; do it just
   once.
2. Check the common case (no match) first.

These are very minor performance tweaks; but, with global link hints,
we pay this cost n times (for n frames).
---
 content_scripts/link_hints.coffee | 15 ++++++++-------
 1 file changed, 8 insertions(+), 7 deletions(-)

diff --git a/content_scripts/link_hints.coffee b/content_scripts/link_hints.coffee
index 08c5cd9b..6ea10377 100644
--- a/content_scripts/link_hints.coffee
+++ b/content_scripts/link_hints.coffee
@@ -506,14 +506,15 @@ class FilterHints
         for searchWord in searchWords
           linkWordScores =
             for linkWord, idx in linkWords
-              if linkWord == searchWord
-                if idx == 0 then 8 else 6
-              else if linkWord.startsWith searchWord
-                if idx == 0 then 4 else 2
-              else if 0 <= linkWord.indexOf searchWord
-                1
+              position = linkWord.indexOf searchWord
+              if position < 0
+                0 # No match.
+              else if position == 0 and searchWord.length == linkWord.length
+                if idx == 0 then 8 else 6 # Whole-word match.
+              else if position == 0
+                if idx == 0 then 4 else 2 # Match at the start of a word.
               else
-                0
+                1 # 0 < position; other match.
           Math.max linkWordScores...
 
       if 0 in searchWordScores
-- 
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