Pulsar application prints a lot of useful information in the log file regarding the sync process.
If you wanted to calculate the total time it took for the user to complete a sync, look for these two timestamps in the log file:
[20-06-11 13:24:17][INFO ][0x16e88f000] - Beginning sync generation 2 [20-06-11 13:24:26][INFO ][0x16e88f000] - Sync completed successfully
The generation number (2, in this example) will keep increasing with each subsequent sync.
The very first/initial sync has the generation number of 0.
So in the above scenario, the catch-up sync took 9 seconds:
13:24:26 - 13:24:17 = 9 seconds