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Use local variable to avoid attribute lookup in form_rxn_matrix loop (#3884)

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Co-authored-by: Perry <yrrepy@users.noreply.github.com>
Co-authored-by: Paul Romano <paul.k.romano@gmail.com>
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Jonathan Shimwell 2026-04-04 22:53:50 +02:00 • committed by GitHub
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1 changed files with 7 additions and 3 deletions
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10
openmc/deplete/chain.py
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@ -701,15 +701,19 @@ class Chain:
if fission_yields is None:
fission_yields = self.get_default_fission_yields()
# Save local variables to avoid attribute lookups in loop
index_nuc = rates.index_nuc
index_rx = rates.index_rx
for i, nuc in enumerate(self.nuclides):
if nuc.name not in rates.index_nuc:
if nuc.name not in index_nuc:
continue
nuc_ind = rates.index_nuc[nuc.name]
nuc_ind = index_nuc[nuc.name]
nuc_rates = rates[nuc_ind, :]
for r_type, target, _, br in nuc.reactions:
r_id = rates.index_rx[r_type]
r_id = index_rx[r_type]
path_rate = nuc_rates[r_id]
# Loss term -- make sure we only count loss once for