[fork CI only] Loop-free search of the next step/jump time in ClipStepSizeController - #1
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etiferrier wants to merge 1 commit into
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`_find_idx_with_hint` walked from the hint with two `lax.while_loop`s. It runs on every step of an adaptive solve, and on GPU each `while_loop` iteration costs a device-to-host synchronisation, so the search added a fixed cost to every step. Use an unrolled binary search (`jnp.searchsorted(..., method="scan_unrolled")`) instead: O(log len(ts)) fused comparisons, no loop. Same result, same dtype. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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Fork CI only; the change is now upstream as patrick-kidger#777. |
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CI run inside my fork, not an upstream PR.
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