Here's a debug log i was able to output for the first 45 mins of the below command. You can see it has checked about 50 of the ~2200 files which if you interpolate means this script would take more than a day just to check. I wonder if I'm actually experiencing issues with Google API limits + rclone is checking md5?
2022/01/30 14:01:21 DEBUG : pacer: low level retry 1/10 (error googleapi: Error 403: User Rate Limit Exceeded. Rate of requests for user exceed configured project quota. You may consider re-evaluating expected per-user traffic to the API and adjust project quota limits accordin
gly. You may monitor aggregate quota usage and adjust limits in the API Console: https://console.developers.google.com/apis/api/drive.googleapis.com/quotas?project=185026326912, userRateLimitExceeded)
2022/01/30 14:01:21 DEBUG : pacer: Rate limited, increasing sleep to 1.122399013s
2022/01/30 14:01:21 DEBUG : pacer: low level retry 1/10 (error googleapi: Error 403: User Rate Limit Exceeded. Rate of requests for user exceed configured project quota. You may consider re-evaluating expected per-user traffic to the API and adjust project quota limits accordin
gly. You may monitor aggregate quota usage and adjust limits in the API Console: https://console.developers.google.com/apis/api/drive.googleapis.com/quotas?project=185026326912, userRateLimitExceeded)
2022/01/30 14:01:21 DEBUG : pacer: Rate limited, increasing sleep to 2.850602937s
2022/01/30 14:01:21 DEBUG : pacer: low level retry 1/10 (error googleapi: Error 403: User Rate Limit Exceeded. Rate of requests for user exceed configured project quota. You may consider re-evaluating expected per-user traffic to the API and adjust project quota limits accordin
gly. You may monitor aggregate quota usage and adjust limits in the API Console: https://console.developers.google.com/apis/api/drive.googleapis.com/quotas?project=185026326912, userRateLimitExceeded)
2022/01/30 14:01:21 DEBUG : pacer: Rate limited, increasing sleep to 4.409799249s
2022/01/30 14:01:21 DEBUG : pacer: low level retry 1/10 (error googleapi: Error 403: User Rate Limit Exceeded. Rate of requests for user exceed configured project quota. You may consider re-evaluating expected per-user traffic to the API and adjust project quota limits accordin
gly. You may monitor aggregate quota usage and adjust limits in the API Console: https://console.developers.google.com/apis/api/drive.googleapis.com/quotas?project=185026326912, userRateLimitExceeded)
2022/01/30 14:01:21 DEBUG : pacer: Rate limited, increasing sleep to 8.385612751s
2022/01/30 14:01:21 DEBUG : pacer: low level retry 1/10 (error googleapi: Error 403: User Rate Limit Exceeded. Rate of requests for user exceed configured project quota. You may consider re-evaluating expected per-user traffic to the API and adjust project quota limits accordin
gly. You may monitor aggregate quota usage and adjust limits in the API Console: https://console.developers.google.com/apis/api/drive.googleapis.com/quotas?project=185026326912, userRateLimitExceeded)
2022/01/30 14:01:21 DEBUG : pacer: Rate limited, increasing sleep to 16.514849582s
2022/01/30 14:01:21 DEBUG : pacer: low level retry 2/10 (error googleapi: Error 403: User Rate Limit Exceeded. Rate of requests for user exceed configured project quota. You may consider re-evaluating expected per-user traffic to the API and adjust project quota limits accordin
gly. You may monitor aggregate quota usage and adjust limits in the API Console: https://console.developers.google.com/apis/api/drive.googleapis.com/quotas?project=185026326912, userRateLimitExceeded)
2022/01/30 14:01:21 DEBUG : pacer: Rate limited, increasing sleep to 16.757115522s
2022/01/30 14:01:21 DEBUG : pacer: Reducing sleep to 0s
2022/01/30 14:01:22 DEBUG : pacer: low level retry 1/10 (error googleapi: Error 403: User Rate Limit Exceeded. Rate of requests for user exceed configured project quota. You may consider re-evaluating expected per-user traffic to the API and adjust project quota limits accordin
gly. You may monitor aggregate quota usage and adjust limits in the API Console: https://console.developers.google.com/apis/api/drive.googleapis.com/quotas?project=185026326912, userRateLimitExceeded)
2022/01/30 14:01:22 DEBUG : pacer: Rate limited, increasing sleep to 1.361459285s
2022/01/30 14:01:22 DEBUG : pacer: low level retry 1/10 (error googleapi: Error 403: User Rate Limit Exceeded. Rate of requests for user exceed configured project quota. You may consider re-evaluating expected per-user traffic to the API and adjust project quota limits accordin
gly. You may monitor aggregate quota usage and adjust limits in the API Console: https://console.developers.google.com/apis/api/drive.googleapis.com/quotas?project=185026326912, userRateLimitExceeded)
2022/01/30 14:01:22 DEBUG : pacer: Rate limited, increasing sleep to 2.241724064s
2022/01/30 14:01:22 DEBUG : pacer: low level retry 1/10 (error googleapi: Error 403: User Rate Limit Exceeded. Rate of requests for user exceed configured project quota. You may consider re-evaluating expected per-user traffic to the API and adjust project quota limits accordin
gly. You may monitor aggregate quota usage and adjust limits in the API Console: https://console.developers.google.com/apis/api/drive.googleapis.com/quotas?project=185026326912, userRateLimitExceeded)
2022/01/30 14:01:22 DEBUG : pacer: Rate limited, increasing sleep to 4.575562339s
2022/01/30 14:01:22 DEBUG : pacer: low level retry 2/10 (error googleapi: Error 403: User Rate Limit Exceeded. Rate of requests for user exceed configured project quota. You may consider re-evaluating expected per-user traffic to the API and adjust project quota limits accordin
gly. You may monitor aggregate quota usage and adjust limits in the API Console: https://console.developers.google.com/apis/api/drive.googleapis.com/quotas?project=185026326912, userRateLimitExceeded)
2022/01/30 14:01:22 DEBUG : pacer: Rate limited, increasing sleep to 8.148615091s
2022/01/30 14:01:22 DEBUG : pacer: Reducing sleep to 0s
2022/01/30 14:01:23 DEBUG : pacer: low level retry 1/10 (error googleapi: Error 403: User Rate Limit Exceeded. Rate of requests for user exceed configured project quota. You may consider re-evaluating expected per-user traffic to the API and adjust project quota limits accordin
gly. You may monitor aggregate quota usage and adjust limits in the API Console: https://console.developers.google.com/apis/api/drive.googleapis.com/quotas?project=185026326912, userRateLimitExceeded)
2022/01/30 14:01:23 DEBUG : pacer: Rate limited, increasing sleep to 1.035459154s
2022/01/30 14:01:23 DEBUG : pacer: low level retry 1/10 (error googleapi: Error 403:
Those all slow things down quite a bit as you wait a few seconds here/there.
What's your quota per 100 seconds in the admin console?