Sourced from nanobind's changelog.

Version 2.12.0 (Feb 25, 2025)

• Added :cpp:class:nb::memoryview that wraps the Python memoryview type. (PR [#1291](https://github.com/wjakob/nanobind/issues/1291) <https://github.com/wjakob/nanobind/pull/1291>__).

• Made stub generation compatible with the Realtime Sanitizer (RTSan) from Clang 20. (PR [#1285](https://github.com/wjakob/nanobind/issues/1285) <https://github.com/wjakob/nanobind/pull/1285>__).

• Fixed a use-after-free when calling functions after their module has been deleted. The internals state is now reference-counted with references held by modules, functions, and types. This also fixes memory leaks reported in issue [#957](https://github.com/wjakob/nanobind/issues/957) <https://github.com/wjakob/nanobind/issues/957>. (PR [#1287](https://github.com/wjakob/nanobind/issues/1287) <https://github.com/wjakob/nanobind/pull/1287>).

• Fixed two regressions from v2.11.0 related to the implicit std::optional :cpp:func:.none() <arg::none> annotation: an off-by-one error that applied the annotation to the wrong argument for methods, and a missing convert flag that silently disabled implicit type conversions. (issues [#1281](https://github.com/wjakob/nanobind/issues/1281) <https://github.com/wjakob/nanobind/issues/1281>, [#1293](https://github.com/wjakob/nanobind/issues/1293) <https://github.com/wjakob/nanobind/issues/1293>, commits ed7ab31 <https://github.com/wjakob/nanobind/commit/ed7ab31f5ffe313b2ca945573e29112ea5e475b2>, 1f96278 <https://github.com/wjakob/nanobind/commit/1f96278c09ec1f7110105f5e2e3dbd2f08dc66a4>).

• ABI version 19.

Version 2.11.0 (Jan 29, 2026)

• This release improves binding performance using CPython's adaptive specializing interpreter (PEP 659 <https://peps.python.org/pep-0659/>__). The speedups are automatic and require no changes to binding code:

  .. list-table:: :header-rows: 1

  • • Operation
    • Speedup
    • Requirements
  • • Method calls
    • 1.22x faster
    • Python 3.11+
  • • Static attribute lookups
    • 1.63x faster
    • Python 3.14+

  This was achieved by making a number of nanobind-internal classes

... (truncated)

• 2a61ad2 v2.12.0 release
• aa95611 changelog updates
• 43a84e3 Add explicit casts to avoid compiler warnings (#1294)
• 52012da docs: minor fix for class enum_ (#1295)
• 8907453 Fix standard macro redefinition warnings from GCC 15.2.1 (#1289)
• 1f96278 Fix missing convert flag for implicit std::optional none annotation (fixes #1...
• 7206bc2 Add nb::memoryview wrapper class (#1291)
• d09aa0a Mention nanobind_json in the nanobind docs (#1288)
• a989344 fix RTD build
• 0cf32e1 CMake: add support for the Realtime Sanitizer (RTSan) (#1285)
• Additional commits viewable in compare view

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