[ITensors] Fix performance bug in svdMPO involving unnecessarily la…

…rge intermediate weight matrices (#1231)
ITensor · Nov 3, 2023 · 063ccbe · 063ccbe
1 parent 5a70eff
commit 063ccbe
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/src/physics/autompo/opsum_to_mpo.jl b/src/physics/autompo/opsum_to_mpo.jl
@@ -16,7 +16,7 @@ function svdMPO(ValType::Type{<:Number}, os::OpSum{C}, sites; kwargs...)::MPO wh
     return (only(site(t[1])) <= n <= only(site(t[end])))
   end
 
-  rightmaps = fill(Dict{Vector{Op},Int}(), N)
+  rightmaps = [Dict{Vector{Op},Int}() for _ in 1:N]
 
   for n in 1:N
     leftbond_coefs = MatElem{ValType}[]