Very slow using FileIO on Julia v0.6.1

[jaakkor2]

With only FileIO 0.5.2 and Compat 034.0 installed, Julia v0.6.1 on Windows gives

julia> @time using FileIO
 11.261115 seconds (3.33 M allocations: 187.777 MiB, 2.70% gc time)

With v0.6.0

julia> @time using FileIO
  0.391243 seconds (134.20 k allocations: 8.279 MiB)

[SimonDanisch]

I guess this is a duplication of: JuliaLang/julia#24383

[jaakkor2]

This is weird. Using precompiled binaries linked to https://julialang.org/downloads/
https://julialang-s3.julialang.org/bin/winnt/x64/0.6/julia-0.6.0-win64.exe
https://julialang-s3.julialang.org/bin/winnt/x64/0.6/julia-0.6.1-win64.exe
https://julialang-s3.julialang.org/bin/winnt/x64/0.6/julia-0.6.2-win64.exe
with

Package Directory: C:\temp\julia\v0.6
1 required packages:
 - FileIO                        0.6.1
1 additional packages:
 - Compat                        0.39.0

timings for using FileIO are as follows, each line is after Julia has been restarted and cache is already recompiled after switching the version

v0.6.0

julia> @time using FileIO
  0.317427 seconds (131.78 k allocations: 7.857 MiB)
julia> @time using FileIO
  0.327539 seconds (133.97 k allocations: 8.106 MiB)
julia> @time using FileIO
  0.340416 seconds (134.19 k allocations: 8.901 MiB)
julia> @time using FileIO
  0.346036 seconds (134.16 k allocations: 8.029 MiB)
julia> @time using FileIO
  0.322332 seconds (135.62 k allocations: 8.164 MiB)
julia> @time using FileIO
  0.333578 seconds (133.87 k allocations: 8.007 MiB)

v0.6.1

julia> @time using FileIO
  3.293605 seconds (1.61 M allocations: 90.356 MiB, 3.68% gc time)
julia> @time using FileIO
  4.922920 seconds (2.27 M allocations: 128.258 MiB, 2.60% gc time)
julia> @time using FileIO
  4.874179 seconds (2.27 M allocations: 128.345 MiB, 2.61% gc time)
julia> @time using FileIO
 28.846144 seconds (12.38 M allocations: 707.156 MiB, 0.66% gc time)
julia> @time using FileIO
 28.586310 seconds (12.38 M allocations: 707.191 MiB, 0.67% gc time)
julia> @time using FileIO
 15.799973 seconds (7.08 M allocations: 400.064 MiB, 1.00% gc time)

v0.6.2

julia> @time using FileIO
 41.969927 seconds (19.23 M allocations: 1.079 GiB, 0.57% gc time)
julia> @time using FileIO
 41.504833 seconds (19.23 M allocations: 1.079 GiB, 0.58% gc time)
julia> @time using FileIO
  3.367089 seconds (1.83 M allocations: 103.326 MiB, 3.72% gc time)
julia> @time using FileIO
 10.860312 seconds (6.23 M allocations: 352.241 MiB, 1.38% gc time)
julia> @time using FileIO
 11.303188 seconds (6.23 M allocations: 352.236 MiB, 1.38% gc time)
julia> @time using FileIO
  5.138920 seconds (3.28 M allocations: 185.204 MiB, 2.56% gc time)

Looks like only v0.6.0 behaves predictably and is quite fast. Timings for v0.6.1 and v0.6.2 vary quite a lot from run to run.

System load is low, power plan is balanced, network speed could be a it flaky, but should not matter.

[jaakkor2]

On Julia v1.0.0, FileIO v1.01, and Windows 7 (same machine as in the original post), times are fast are reproducible, so therefore I am closing this issue.

  julia> @time using FileIO
  0.249403 seconds (242.95 k allocations: 13.776 MiB)

  julia> @time using FileIO
  0.208581 seconds (242.95 k allocations: 13.776 MiB)

  julia> @time using FileIO
  0.210918 seconds (242.95 k allocations: 13.776 MiB)