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Upload with a single 1 MiB buffer instead of one per chunk when checksumming in a header (−60 MB RSS on a 21 MB PUT) - #3465

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czj wants to merge 8 commits into

aws:version-3from

czj:perf/checksum-reuse-read-buffer

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Upload with a single 1 MiB buffer instead of one per chunk when checksumming in a header (−60 MB RSS on a 21 MB PUT)#3465
czj wants to merge 8 commits into
aws:version-3from
czj:perf/checksum-reuse-read-buffer

Commits on Nov 9, 2026
- Reduce memory allocations in chunked checksum uploads
  
  kpumuk
  authored and
  jterapin
  committed
  2b0af66
- Preserve custom body compatibility for trailer checksums
  jterapin
  committed
  0b285bf
- Classify checksum allocation improvements as a core feature
  jterapin
  committed
  e99d3aa
- Preserve trailer read buffers and fix compatibility defaults
  jterapin
  committed
  f3b929c
- Reuse a single read buffer when computing request checksums in a header
  
  czj
  authored and
  jterapin
  committed
  c5be054
- Preserve custom body compatibility for header checksums
  jterapin
  committed
  725d1f9
- Clarify header checksum allocation changelog entry
  jterapin
  committed
  44a0e28
- Merge branch 'version-3' into perf/checksum-reuse-read-buffer
  richardwang1124
  authored
  4323ab9