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Lowstorage 3sp#3686

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singhharsh1708 wants to merge 6 commits into
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singhharsh1708:lowstorage-3sp
Closed

Lowstorage 3sp#3686
singhharsh1708 wants to merge 6 commits into
SciML:masterfrom
singhharsh1708:lowstorage-3sp

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@singhharsh1708

@singhharsh1708 singhharsh1708 commented May 27, 2026

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Summary

Converts the 3Sp and 3SpFSAL families (CKLLSRK43_2, CKLLSRK54_3C, CKLLSRK95_4S/4C/4M, RDPK3Sp35/49/510, RDPK3SpFSAL35/49/510) to plain-dispatch step implementations in generic_low_storage_perform_step.jl, dispatched on LowStorageRK3SpConstantCache and LowStorageRK3SpFSALConstantCache respectively.

Thin wrappers in low_storage_rk_perform_step.jl delegate to the generic implementations.

Part of the stacked series: #3683 (2N) → #3684 (2C) → #3685 (3S) → #3686 (3Sp + 3SpFSAL)#3687#3688.

Test plan

  • OOP and IIP paths validated against master — step counts and solution values identical.
  • CI passes.

@singhharsh1708

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Closing in favour of the consolidated approach in #3683 — the substantive change (consolidating RK46NL into LowStorageRKTableau{TwoN}) will be done there instead.

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