[python-bsonjs] Bump the bundled libbson to 2.x

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    • Type: Task
    • Resolution: Unresolved
    • Priority: Major - P3
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    • Affects Version/s: None
    • Component/s: python-bsonjs
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    • Python Drivers
    • Not Needed
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      Context

      python-bsonjs currently bundles libbson 1.27.2. We should upgrade to libbson 2.0, which includes performance improvements that were added in 1.29.0. Rather than bumping to that version, we should bump to the currently maintained major version.

      See https://github.com/mongodb/mongo-c-driver/pull/2377 for discussion.

      Definition of done

      Update the bundled libbson to the current tag (2.5.0 as of Aug 8, 2026). Update documentation and vendoring scripts add needed.

      Pitfalls

      We ran into some differences between the two major versions in https://github.com/mongodb-labs/mongo-arrow/pull/332 (INTPYTHON-665).

            Assignee:
            Steve Silvester
            Reporter:
            Steve Silvester
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              Created:
              Updated: