Yesterday, 234 patients were treated at the department - the busiest day on record, exceeding the 212 patients seen on World Cup opening night.
Almost all of the patients, 98 per cent, were seen within the target waiting time of six hours, the department reported.
On Labour Day patient numbers increased by more than half of the usual daily rate of 150, which at times meant a new patient arrived every two to three minutes, said a department spokeswoman.
Dr Parke said planning for the event had helped staff cope with the workload, but acknowledged at times the system was under "quite a bit of pressure".
Extra staff were rostered on each week, especially during the opening and finals, and a short stay unit was set up so patients could be monitored following treatment.
"Even during the busiest times, the department was well under control and generally able to exceed the Ministry of Health's six-hour waiting time target for ED patients," Dr Parke said.