Author	SHA1	Message	Date
Simon Chrzanowski	486768ba19	Use smaller upload buffers for S3 and Azure ... Store passed empty writer options, so the S3 driver allocated six 8 MiB part buffers up front for every object over 16 MiB, on top of reading the first 16 MiB whole, and Azure used five 8 MiB blocks. Use 5 MiB parts, the S3 minimum, with two uploads in flight. A 32 MiB store against a fake S3 endpoint allocates 54 MB instead of 88 MB.	2026-10-25 17:22:23 +01:00