Significant regression in TTFX, Julia 1.11

[jakobnissen]

With a nearly empty dummy package Foo, and running:

julia> using JET, Foo

julia> @time @eval report_package(Foo)

I get the following timings:
1.10.4: 11.770015 seconds (13.73 M allocations: 977.822 MiB, 10.09% gc time, 99.85% compilation time)
1.11-rc2: 33.809627 seconds (51.71 M allocations: 2.676 GiB, 4.95% gc time, 99.86% compilation time)

The high level of compilation and allocations suggests perhaps something could be done to reduce this?

[lgoettgens]

Now that julia 1.11 is out, the issue seems to have gotten even worse. I've done some timings on @report_opt and @report_call, as these are the things from JET that I used to use on a daily basis. But with these regressions, that seems no longer viable on 1.11.

All timings have been performed with JET v0.9.10
1.10.5:

julia> using JET

julia> @time @eval @report_opt 2+2
  0.246439 seconds (308.67 k allocations: 20.559 MiB, 99.73% compilation time)
No errors detected


julia> @time @eval @report_opt 2+2
  0.000364 seconds (488 allocations: 31.539 KiB, 0.14% compilation time)
No errors detected


julia> @time @eval @report_call 2+2
  0.106172 seconds (40.82 k allocations: 2.802 MiB, 99.48% compilation time)
No errors detected


julia> @time @eval @report_call 2+2
  0.000817 seconds (207 allocations: 12.602 KiB, 0.13% compilation time)
No errors detected

1.11.0:

julia> using JET

julia> @time @eval @report_opt 2+2
 13.131656 seconds (30.70 M allocations: 1.605 GiB, 6.32% gc time, 100.00% compilation time)
No errors detected


julia> @time @eval @report_opt 2+2
  0.000365 seconds (653 allocations: 29.164 KiB, 0.13% compilation time)
No errors detected


julia> @time @eval @report_call 2+2
 14.425664 seconds (24.85 M allocations: 1.291 GiB, 3.23% gc time, 100.00% compilation time)
No errors detected


julia> @time @eval @report_call 2+2
  0.000318 seconds (266 allocations: 12.039 KiB, 0.18% compilation time)
No errors detected

1.11.1:

julia> using JET

julia> @time @eval @report_opt 2+2
 13.215292 seconds (30.75 M allocations: 1.607 GiB, 9.01% gc time, 100.00% compilation time)
No errors detected


julia> @time @eval @report_opt 2+2
  0.000359 seconds (653 allocations: 29.164 KiB, 0.15% compilation time)
No errors detected


julia> @time @eval @report_call 2+2
 13.560778 seconds (24.86 M allocations: 1.292 GiB, 4.25% gc time, 99.99% compilation time)
No errors detected


julia> @time @eval @report_call 2+2
  0.000314 seconds (266 allocations: 12.039 KiB, 0.16% compilation time)
No errors detected

Edit: Re-ran everything on a different device, and added 1.11.1