CpuTimer cpuTimer = new CpuTimer();
execute(taskContext);
CpuDuration executionTime = cpuTimer.elapsedTime();
TaskStats taskStats = taskContext.getTaskStats();
long inputRows = taskStats.getRawInputPositions();
long inputBytes = taskStats.getRawInputDataSize().toBytes();
long outputRows = taskStats.getOutputPositions();
long outputBytes = taskStats.getOutputDataSize().toBytes();
double inputMegaBytes = new DataSize(inputBytes, BYTE).getValue(MEGABYTE);
return ImmutableMap.<String, Long>builder()
// legacy computed values