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Starting from November 2022, new worklog sync is a continuous process, not an hourly sync like before, which creates more even distribution of request load to handle large tenant better by limiting the amount of synced worklogs per iteration to 100K worklogs. It divides the sync-workers more equally between tenants, large syncs (such as Server to Cloud Migration) don’t block smaller syncs, and request load is more distributed.
Starting from March 2023, worklog sync still is a continuous process, but switching to an asynchronous approach to reduce latency of the endpoint by a significant amount and to improve latency when creating worklogs using the public API.