The issue’s re-appeared. This time it only manifests after importing the package Plots:
julia> using BenchmarkTools
julia> function motif2(v::Vector{Vector{Float64}})
out = Vector{Float64}(undef, sum(length, v))
offset = 0
for vect in v
for i ∈ eachindex(vect)
@inbounds out[offset + i] = vect[i]
end
offset += lastindex(vect)
end
out
end
motif2 (generic function with 1 method)
julia> vects = [rand(10) for i = 1:10];
julia> @benchmark motif2($vects)
BenchmarkTools.Trial: 10000 samples with 983 evaluations.
Range (min … max): 61.343 ns … 1.403 μs ┊ GC (min … max): 0.00% … 65.96%
Time (median): 76.399 ns ┊ GC (median): 0.00%
Time (mean ± σ): 106.685 ns ± 90.701 ns ┊ GC (mean ± σ): 7.25% ± 9.22%
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61.3 ns Histogram: log(frequency) by time 559 ns <
Memory estimate: 896 bytes, allocs estimate: 1.
julia> using Plots
julia> @benchmark motif2($vects)
BenchmarkTools.Trial: 5878 samples with 978 evaluations.
Range (min … max): 70.654 ns … 59.460 μs ┊ GC (min … max): 0.00% … 99.52%
Time (median): 83.027 ns ┊ GC (median): 0.00%
Time (mean ± σ): 871.062 ns ± 6.223 μs ┊ GC (mean ± σ): 82.20% ± 11.33%
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70.7 ns Histogram: log(frequency) by time 54.2 μs <
Memory estimate: 896 bytes, allocs estimate: 1.
However, unlike the previous issue, re-starting the REPL and not importing Plots fixes the issue.