[TCWG-1424] Using profile feedback to investigate code size

- Have most of the information I need to draw some conclusions. Should have the remaining runs I need over the weekend. - Next step is to analyse the data a bit more formally and write up. - Discuss next steps. It may be worth polishing up the pass and posting upstream as an RFC. - Would like to wrap the investigation up by the end of July

On holiday on Friday 20th July and Monday 23rd July, back in the office on Tuesday 24th.