nodecraft / b2-cloud-storage / 1e395326b4e7fce7e77fd9789803abfa0ec4b209

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perf: improve upload performance

  - Support `hash: false` to skip whole-file SHA1 computation, using
    `do_not_verify` for small files and omitting hash metadata for large files
  - Eliminate double disk read per part in large file uploads by using a SHA1
    transform stream during upload instead of separate hash and upload passes
  - Add `defaultUploadConcurrency` constructor option to configure parallel part uploads (default: 4)
  - Auto-increase part size for files that would exceed B2's 10,000 part limit

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