Use static regex for simple codespan results

gettalong · May 6, 2019 · 9867a3b · 9867a3b
1 parent 68d44ec
commit 9867a3b
Showing 1 changed file with 12 additions and 2 deletions.
diff --git a/lib/kramdown/parser/kramdown/codespan.rb b/lib/kramdown/parser/kramdown/codespan.rb
@@ -25,8 +25,18 @@ def parse_codespan
           return
         end
 
-        if (text = @src.scan_until(/#{result}/))
-          text.sub!(/#{result}\Z/, '')
+        # assign static regex to avoid allocating the same on every instance
+        # where +result+ equals a single-backtick. Interpolate otherwise.
+        if result == '`'
+          scan_pattern = /`/
+          str_sub_pattern = /`\Z/
+        else
+          scan_pattern = /#{result}/
+          str_sub_pattern = /#{result}\Z/
+        end
+
+        if (text = @src.scan_until(scan_pattern))
+          text.sub!(str_sub_pattern, '')
           unless simple
             text = text[1..-1] if text[0..0] == ' '
             text = text[0..-2] if text[-1..-1] == ' '