Hi Andrew - you should give the 'official' benchmarks a try:
http://dcpomatic.com/benchmarks/contributing
Encoding speed is highly dependent on source footage and settings, so the only way to
compare benchmarks is to use same footage and settings/metadata.
Also, your T5500 seems to be a Dual-SixcoreHT machine. You should set the number of
compute threads to at least 24-32 to maximize performance. For most HT CPUs, it seems some
'overthreading' gives the best overall performance.
- Carsten