Thread-local `Dict` for each thread?

kristoffer.carlsson · December 8, 2020, 3:38pm

You create one dict for each thread, put them in a vector, and when you want one you index with the thread id. Same as:

JuliaLang/julia/blob/af0006e1edd25b67891bb86330e294e41a036b3d/stdlib/Random/src/RNGs.jl#L369-L381


      
          const THREAD_RNGs = MersenneTwister[]
          @inline default_rng() = default_rng(Threads.threadid())
          @noinline function default_rng(tid::Int)
              0 < tid <= length(THREAD_RNGs) || _rng_length_assert()
              if @inbounds isassigned(THREAD_RNGs, tid)
                  @inbounds MT = THREAD_RNGs[tid]
              else
                  MT = MersenneTwister()
                  @inbounds THREAD_RNGs[tid] = MT
              end
              return MT
          end
          @noinline _rng_length_assert() =  @assert false "0 < tid <= length(THREAD_RNGs)"

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Thread-local `Dict` for each thread?

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