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[CI baseline, do not merge] upstream c20dbc6 vs BatchZero/master#2

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BatchZero wants to merge 18 commits into
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feature/ci-baseline-only
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[CI baseline, do not merge] upstream c20dbc6 vs BatchZero/master#2
BatchZero wants to merge 18 commits into
masterfrom
feature/ci-baseline-only

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@BatchZero

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Control PR for the PR1 CI baseline experiment — DO NOT MERGE.

Purpose: this branch is exactly upstream/master @ c20dbc6 with ZERO PR1 changes
on top. It exists to baseline what BatchZero CI looks like when the diff is
purely 'upstream commits since BatchZero/master @ 46f2ef2' — no homotopy
operator work added.

Comparison with sibling PR #1:

Failure delta between #2 and #1 isolates which CI reds are attributable to
the PR1 homotopy operator work vs which are inherited from the upstream
baseline (which is currently red on SciML's own CI).

Will be closed after the comparison is recorded.

AayushSabharwal and others added 18 commits May 15, 2026 11:29
This shaves off around 33% of runtime in `mtkcompile` for the model I am testing it on:

Before:

```
11.193316 seconds (136.79 M allocations: 6.120 GiB, 6.71% gc time)
```

After:

```
 7.570217 seconds (85.88 M allocations: 3.767 GiB, 4.58% gc time)
```
refactor: use `IRInfo` and `IRStructure` for `full_equations`
avoid calling `unhack_system` twice for the same `system`
…ructor`

This used to be the lion's share of the compile time in large models.
The infrastructure added here might be useful in other places too.
Enables supporting ReverseDiff AD
fix: avoid generating massive functions in `get_mtkparameters_reconstructor`
build: bump MTKBase, MTK patch versions
@BatchZero

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Experiment concluded. CI baseline established (47 Tests-workflow fails are upstream-baseline / codecov-token environment issues, not caused by any PR1 changes). Closing.

@BatchZero BatchZero closed this May 22, 2026
@BatchZero BatchZero deleted the feature/ci-baseline-only branch May 22, 2026 06:25
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3 participants