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feat: cache unhack_system #32

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Merged
AayushSabharwal merged 1 commit into from
Feb 12, 2026
Merged

feat: cache unhack_system #32

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24 changes: 19 additions & 5 deletions lib/ModelingToolkitTearing/src/ModelingToolkitTearing.jl
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Original file line number Diff line number Diff line change
Expand Up @@ -54,7 +54,16 @@ abstract type ReassembleAlgorithm end

include("reassemble.jl")

struct UnhackSystemCacheKey end

function MTKBase.unhack_system(sys::System)
cache = getmetadata(sys, MTKBase.MutableCacheKey, nothing)
if cache isa MTKBase.MutableCacheKey
cached_sys = get(cache, UnhackSystemCacheKey, nothing)
if cached_sys isa System
return cached_sys
end
end
# Observed are copied by the masking operation
obseqs = observed(sys)
eqs = copy(equations(sys))
Expand Down Expand Up @@ -147,11 +156,16 @@ function MTKBase.unhack_system(sys::System)

dvs = [unknowns(sys); additional_vars]

@set! sys.observed = obseqs
@set! sys.eqs = eqs
@set! sys.unknowns = dvs
@set! sys.schedule = sched
return sys
newsys = @set sys.observed = obseqs
@set! newsys.eqs = eqs
@set! newsys.unknowns = dvs
@set! newsys.schedule = sched

if cache isa MTKBase.MutableCacheT
cache[UnhackSystemCacheKey] = newsys
end

return newsys
end

function populate_inline_scc_map!(
Expand Down
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