pkgimg alloc count disparity

[daviehh]

May be related to #48215

The allocation count when using pkgimg may be off by quite a bit, setup a simple package here to show this issue:

test with

using report_alloc

@time report_alloc.do_ode(); # first JIT run

@time report_alloc.do_ode(); # running compiled

default (no additional arguments/sratup files), i.e. using pkgimg

0.001121 seconds (24.70 k allocations: 1.124 MiB)

with julia --pkgimages=no

0.000862 seconds (10.51 k allocations: 925.016 KiB)

for reference, julia 1.8

0.001279 seconds (10.51 k allocations: 925.094 KiB)

The allocation count is quite higher for the default case (using pkgimg), and the difference may be more pronounced for more complex packages or when more types of function calls are precompiled.

julia> versioninfo()
Julia Version 1.9.0-beta4
Commit b75ddb787ff (2023-02-07 21:53 UTC)
Platform Info:
  OS: macOS (arm64-apple-darwin21.5.0)
  CPU: 10 × Apple M1 Pro
  WORD_SIZE: 64
  LIBM: libopenlibm
  LLVM: libLLVM-14.0.6 (ORCJIT, apple-m1)
  Threads: 1 on 8 virtual cores
Environment:
  JULIA_MATHLINK = /Applications/Mathematica.app/Contents/Frameworks/mathlink.framework
  JULIA_MATHKERNEL = /Applications/Mathematica.app/Contents/MacOS/MathKernel

[timholy]

Do you get the same result on nightly? There were some recent changes that might fix this.

[daviehh]

Yes, same result on nightly

Julia Version 1.10.0-DEV.703
Commit eb36cb9e7d0 (2023-03-04 18:30 UTC)
Platform Info:
  OS: macOS (arm64-apple-darwin21.3.0)
  CPU: 10 × Apple M1 Pro
  WORD_SIZE: 64
  LIBM: libopenlibm
  LLVM: libLLVM-14.0.6 (ORCJIT, apple-m1)
  Threads: 1 on 8 virtual cores