Extremely slow import for other packages (DataFrames, Plots, ...) loaded after SciML packages

[sjdaines]

TruncatedStacktraces is apparently adding minutes to startup time, apparently due to a slowdown in import / using of other packages loaded after OrdinaryDiffEq. This is particularly bad with Julia 1.8 (? 1.8.3 tested here), resulting in several minutes increase to startup time.

Example timings for two sequences, with TruncatedStacktraces disabled and enabled (in LocalPreferences.toml)

1. using OrdinaryDiffEq; import DataFrames; using Plots
2. import DataFrames; using Plots; using OrdinaryDiffEq

Julia 1.8.3, linux

SciMLBase 1.91.2, TruncatedStackTraces 1.2.0

	using OrdinaryDiffEq	import DataFrames	using Plots	using OrdinaryDiffEq	total
disable = true	20.8	5.8	14.7	-	41.3
disable = true	-	3.0	7.4	20.3	30.7
disable = false	31.0	72.9	51.0	-	155.9
disable = false	-	3.1	7.4	32.0	42.5

Julia 1.9.0-beta4, Windows (NB: also different computer to above)

SciMLBase 1.91.1, TruncatedStackTraces 1.2.0

	using OrdinaryDiffEq	import DataFrames	using Plots	using OrdinaryDiffEq	total
disable = false	21.6	17.4	30.7	-	69.7
disable = false	-	2.5	6.4	23.7	32.6

[ChrisRackauckas]

What version of SciMLBase?

[sjdaines]

some results were 1.91.2, some are 1.91.1 (see note above, doesn't look like that makes much difference)

[ChrisRackauckas]

v1.91.2 should make a big difference because that would make 100% of the show methods disappear when disabled by the preference.

[ChrisRackauckas]

It should make the disable=true one better I mean. disable=false won't change.

[sjdaines]

disable=true works and restores previous behaviour (or close to it)

The problem here is that the default (no setting in LocalPreferences.toml) is causing problems with several minutes added to startup time, which is a real issue for users with Julia 1.8 (who are also not Julia power-users).

Could this be made an opt-in instead of an opt-out ?

[sjdaines]

See also SciML/DifferentialEquations.jl#947 SciML/SciMLBase.jl#409

[ChrisRackauckas]

Fixed by making stacktraces huge by default.