Hang on, loading the diffs via AJAX and using deffered rendering ...
Rendering non blocking huge diffs: {{ diff.lines.length }} / {{ diffLength }}
Old    {{diff.old}}
   New {{diff.new}}
{{showNumber(lineInfo) ? lineInfo['num-old'] : '  '}} {{showNumber(lineInfo) ? lineInfo['num-new'] : '  '}} 
{{lineInfo.line}}