27 Jun
2025
27 Jun
'25
2:59 p.m.
Hi all, I am investigating a performance issue related to uploading s3 objects and would appreciate any insights. I have a bucket with ~200 million objects. I noticed that re-uploading files that already exist in the bucket appears to be slower than uploading them for the first time. To verify this behavior, I created a small test case with a new empty bucket: - 500 files with random sizes between 5 KB and 50 KB. - First time upload took 8 seconds: s3cmd put files/* s3://my-bucket/ - Second upload (same files, no changes) took 10 seconds I had expected the second upload to be faster or at least the same. Is this expected behavior? Any guidance on this would be appreciated. Thanks! Sinan