Merge branch 'master' into dd/sum-fields

.gitignore

@@ -20,4 +20,6 @@ tests/benchmarks/.benchmarks/
 *.output
 *.pdf
 *.pyc
+*.swp
+*.swo
 .pymon

CHANGELOG.md

@@ -12,12 +12,22 @@ New Features
 - Changes ``ToroidalFlux`` objective to default using a 1D loop integral of the vector potential
 to compute the toroidal flux when possible, as opposed to a 2D surface integral of the magnetic field dotted with ``n_zeta``.
 - Allow specification of Nyquist spectrum maximum modenumbers when using ``VMECIO.save`` to save a DESC .h5 file as a VMEC-format wout file
+- Added and tested infinite-n ideal-ballooning stability solver implemented as a part of the BallooningStability Objective. DESC can use reverse-mode AD to now optimize equilibria against infinite-n ideal ballooning modes.
+- Add ``jac_chunk_size`` to ``ObjectiveFunction`` and ``_Objective`` to control the above chunk size for the ``fwd`` mode Jacobian calculation
+  - if ``None``, the chunk size is equal to ``dim_x``, so no chunking is done
+  - if an ``int``, this is the chunk size to be used.
+  - if ``"auto"`` for the ``ObjectiveFunction``, will use a heuristic for the maximum ``jac_chunk_size`` needed to fit the jacobian calculation on the available device memory, according to the formula: ``max_jac_chunk_size = (desc_config.get("avail_mem") / estimated_memory_usage - 0.22)  / 0.85  * self.dim_x`` with ``estimated_memory_usage = 2.4e-7 * self.dim_f * self.dim_x + 1``
+- the ``ObjectiveFunction`` ``jac_chunk_size`` is used if ``deriv_mode="batched"``, and the ``_Objective`` ``jac_chunk_size`` will be used if ``deriv_mode="blocked"``
+
 
 Bug Fixes
 
 - Fixes bugs that occur when saving asymmetric equilibria as wout files
 - Fixes bug that occurs when using ``VMECIO.plot_vmec_comparison`` to compare to an asymmetric wout file
 
+Deprecations
+
+- ``deriv_mode="looped"`` in ``ObjectiveFunction`` is deprecated and will be removed in a future version in favored of ``deriv_mode="batched"`` with ``jac_chunk_size=1``,
 
 
 v0.12.1