EmaCppIProvPerf encodes the timestamp as part of its message payload. The timestamp is taken at the start of encoding and added as field TIM_TRK_1 (3902) for Update message, field TIM_TRK_2 (3903) for Post message, and field TIM_TRK_3 (3904) for Generic message. Latency is measured after ConsPerf completes decoding.