hi,
this is the command, just run it again now, took 26 seconds.
rclone sync D:\files\source wasabi01:rclonelotsoffiles --size-only --transfers=128 --checkers=128 --dry-run --progress --stats-one-line --log-level=INFO --log-file=log.fast.nolist.txt
as for --size-only, on s3, does not require extra api calls, so that does speed things up.
as for --checksum, as per the docs.
https://rclone.org/s3/#avoiding-head-requests-to-read-the-modification-time
"If the source and destination are both S3 this is the recommended flag to use for maximum efficiency."