Difference between @time in Julia 1.3.1 and Julia 1.4.0-rc2

WschW · March 4, 2020, 6:01am

Looking at the implementation of the macro it seems that this line has been changed:

JuliaLang/julia/blob/0e8143e1e7d125b74e474d0fbd3a5a5e2d574779/base/util.jl#L172


      
          julia> @time begin
                     sleep(0.3)
                     1+1
                 end
            0.301395 seconds (8 allocations: 336 bytes)
          2
          ```
          """
          macro time(ex)
              quote
                  while false; end # compiler heuristic: compile this block (alter this if the heuristic changes)
                  local stats = gc_num()
                  local elapsedtime = time_ns()
                  local val = $(esc(ex))
                  elapsedtime = time_ns() - elapsedtime
                  local diff = GC_Diff(gc_num(), stats)
                  time_print(elapsedtime, diff.allocd, diff.total_time,
                             gc_alloc_count(diff))
                  println()
                  val
              end

I suspect that could be the reason based on the comment next to it.

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Difference between @time in Julia 1.3.1 and Julia 1.4.0-rc2

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