# Investigate long compile times
**URL:** https://discourse.julialang.org/t/investigate-long-compile-times/119019
**Category:** Performance
**Created:** [September 4, 2024, 6:25am UTC](https://discourse.julialang.org/t/investigate-long-compile-times/119019 "2024-09-04T06:25:11Z")
**Posts on this page:** 13
**Page:** 1
### Author:  [@rveltz](https://discourse.julialang.org/u/rveltz)
#### Post date: [September 4, 2024, 6:25am UTC](https://discourse.julialang.org/t/investigate-long-compile-times/119019/1 "2024-09-04T06:25:11Z")
Hi,
Can someone give me hint on why the following call takes ~2mn to compile please? If you have an idea of the culprit and suggestions, I’d be very happy to hear them 😃
Thanks a lot for your help,
```julia
fold_po_coll = @time continuation(deepcopy(br_po), 1, (@optic _.c5), opts_pocoll_fold;
detect_codim2_bifurcation = 0,
jacobian_ma = :minaug,
bdlinsolver = BorderingBLS(solver = DefaultLS(), check_precision = false),
)
```
The function calls [continuation\_coll\_fold](https://github.com/bifurcationkit/BifurcationKit.jl/blob/master/src/periodicorbit/codim2/PeriodicOrbitCollocation.jl#L106) and then the general [continuation\_fold](https://github.com/bifurcationkit/BifurcationKit.jl/blob/master/src/codim2/MinAugFold.jl#L315). In comparison, calling the function [continuation\_coll\_pd](https://github.com/bifurcationkit/BifurcationKit.jl/blob/master/src/periodicorbit/codim2/PeriodicOrbitCollocation.jl#L173) does not lead to large compiles times (~10s).
I know that I have closures in `continuation_fold` but this is true for [continuation\_pd](https://github.com/bifurcationkit/BifurcationKit.jl/blob/master/src/periodicorbit/codim2/MinAugPD.jl#L255) and this does not seem to cause large compile times.
Below is a MWE to show the compile time:
```julia
using Revise
using BifurcationKit
function Fsl(u, p)
(;r, μ, ν, c3, c5) = p
u1, u2 = u
f = similar(u)
ua = u1^2 + u2^2
f[1] = r * u1 - ν * u2 + ua * (c3 * u1 - μ * u2) + c5 * ua^2 * u1
f[2] = r * u2 + ν * u1 + ua * (c3 * u2 + μ * u1) + c5 * ua^2 * u2
return f
end
par_sl = (r = -0.5, μ = 0., ν = 1.0, c3 = 0.1, c5 = -0.01)
prob = BifurcationProblem(Fsl, [0., 0], par_sl, (@optic _.r))
opts = ContinuationPar(p_min = -1.)
br = continuation(prob, PALC(), opts)
# branch of periodic orbits
br_po = continuation(br, 1, opts,
PeriodicOrbitOCollProblem(20, 4)
)
# computation of folds of periodic orbits
opts_pocoll_fold = ContinuationPar(br_po.contparams, max_steps = 10, p_max=1.2)
fold_po_coll = @time continuation(deepcopy(br_po), 1, (@optic _.c5), opts_pocoll_fold;
detect_codim2_bifurcation = 0,
jacobian_ma = :minaug,
bdlinsolver = BorderingBLS(solver = DefaultLS(), check_precision = false),
)
```
---
### Author:  [@ufechner7](https://discourse.julialang.org/u/ufechner7)
#### Post date: [October 14, 2024, 6:21am UTC](https://discourse.julialang.org/t/investigate-long-compile-times/119019/2 "2024-10-14T06:21:22Z")
What is the output of
```julia
versioninfo()
```
?
---
### Author:  [@rveltz](https://discourse.julialang.org/u/rveltz)
#### Post date: [October 14, 2024, 7:28am UTC](https://discourse.julialang.org/t/investigate-long-compile-times/119019/3 "2024-10-14T07:28:54Z")
```julia
julia> versioninfo()
Julia Version 1.10.5
Commit 6f3fdf7b362 (2024-08-27 14:19 UTC)
Build Info:
Official https://julialang.org/ release
Platform Info:
OS: macOS (arm64-apple-darwin22.4.0)
CPU: 12 × Apple M2 Max
WORD_SIZE: 64
LIBM: libopenlibm
LLVM: libLLVM-15.0.7 (ORCJIT, apple-m1)
Threads: 8 default, 0 interactive, 4 GC (on 8 virtual cores)
Environment:
JULIA_EDITOR = code
JULIA_NUM_THREADS = 8
```
---
### Author:  [@ufechner7](https://discourse.julialang.org/u/ufechner7)
#### Post date: [October 14, 2024, 7:53am UTC](https://discourse.julialang.org/t/investigate-long-compile-times/119019/4 "2024-10-14T07:53:28Z")
When I run this on Ubuntu Linux on a Ryzen 7840u laptop I get:
```julia
julia> @eval @time include("mwe.jl")
┌ Warning: The guess for the amplitude of the first periodic orbit on the bifurcated branch obtained by the predictor is not small: 0.4472135954976816. This may lead to convergence failure of the first newton step or select a branch far from the Hopf point.
│ You can either decrease `ds` or `δp` (which is how far from the bifurcation point you want the branch of periodic orbits to start). Alternatively, you can specify a multiplicative factor `ampfactor` to be applied to the predictor amplitude.
└ @ BifurcationKit ~/.julia/packages/BifurcationKit/KwA2l/src/periodicorbit/PeriodicOrbits.jl:413
33.738423 seconds (28.05 M allocations: 1.998 GiB, 2.15% gc time, 99.53% compilation time)
66.162634 seconds (92.21 M allocations: 6.284 GiB, 4.40% gc time, 98.12% compilation time: <1% of which was recompilation)
┌─ Curve type: FoldPeriodicOrbitCont
├─ Number of points: 11
├─ Type of vectors: BorderedArray{Vector{Float64}, Float64}
├─ Parameters (:r, :c5)
├─ Parameter c5 starts at -0.01, ends at -0.004444740574832257
├─ Algo: PALC
└─ Special points:
- # 1, endpoint at c5 ≈ -0.00395615, step = 11
```
Any suggestions how to get more insight on which tasks the compilation time is spent?
---
### Author:  [@rveltz](https://discourse.julialang.org/u/rveltz)
#### Post date: [October 14, 2024, 9:23am UTC](https://discourse.julialang.org/t/investigate-long-compile-times/119019/5 "2024-10-14T09:23:45Z")
The compilation time is spent in the computation of `fold_po_coll`. If you copied my code in `mwe.jl`, there is only one `@time` in it, so I guess the `33s` reported correspond to the long computation time I observe.
---
### Author:  [@rveltz](https://discourse.julialang.org/u/rveltz)
#### Post date: [October 14, 2024, 11:05pm UTC](https://discourse.julialang.org/t/investigate-long-compile-times/119019/6 "2024-10-14T23:05:48Z")
The call itself takes `0.1s` once compiled…
---
### Author:  [@rveltz](https://discourse.julialang.org/u/rveltz)
#### Post date: [October 14, 2024, 11:07pm UTC](https://discourse.julialang.org/t/investigate-long-compile-times/119019/7 "2024-10-14T23:07:41Z")
using [Tools to Analyze Long Julia Compilation Times - #3 by SteffenPL](https://discourse.julialang.org/t/tools-to-analyze-long-julia-compilation-times/109510/3), I chose to profile the first run. Here is what I get
---
### Author:  [@rveltz](https://discourse.julialang.org/u/rveltz)
#### Post date: [October 14, 2024, 11:09pm UTC](https://discourse.julialang.org/t/investigate-long-compile-times/119019/8 "2024-10-14T23:09:34Z")
---
### Author:  [@rveltz](https://discourse.julialang.org/u/rveltz)
#### Post date: [January 11, 2025, 9:54am UTC](https://discourse.julialang.org/t/investigate-long-compile-times/119019/9 "2025-01-11T09:54:25Z")
I still dont understand what is causing the long compile time. I thought it was d2F so I changed the call to
```julia
continuation(deepcopy(br_po), 1, (@optic _.c5), opts_pocoll_fold;
detect_codim2_bifurcation = 0,
jacobian_ma = :minaug,
bdlinsolver = BorderingBLS(solver = DefaultLS(), check_precision = false),
usehessian = false,
)
```
but now I get the following and I dont know how to progress
---
### Author:  [@rveltz](https://discourse.julialang.org/u/rveltz)
#### Post date: [March 3, 2025, 9:54pm UTC](https://discourse.julialang.org/t/investigate-long-compile-times/119019/10 "2025-03-03T21:54:41Z")
@ChrisRackauckas @tim.holy
---
### Author:  [@kristoffer.carlsson](https://discourse.julialang.org/u/kristoffer.carlsson)
#### Post date: [March 4, 2025, 11:20am UTC](https://discourse.julialang.org/t/investigate-long-compile-times/119019/11 "2025-03-04T11:20:04Z")
You have some pretty big types. Here is one method that takes ~8 seconds to compile. I can’t actually post the full type since it hits the limit of the post length (below is just a small part):
`#= 8111.2 ms =# precompile(Tuple{typeof(Core.kwcall), NamedTuple{(:linear_algo, :finalise_solution, :kind, :normC, :event), Tuple{BifurcationKit.BorderingBLS{BifurcationKit.FoldLinearSolverMinAug, Float64}, BifurcationKit.var"#update_minaug_fold#541"{BifurcationKit.var"#update_minaug_fold#535#542"{Float64, Int64, typeof(LinearAlgebra.norm), Base.Pairs{Symbol, BifurcationKit.Finaliser{BifurcationKit.FoldMAProblem{BifurcationKit.FoldProblemMinimallyAugmented{BifurcationKit.WrapPOColl{BifurcationKit.PeriodicOrbitOCollProblem{BifurcationKit.BifurcationProblem{BifurcationKit.BifFunction{typeof(Main.Fsl), BifurcationKit.var"#128#129"{typeof(Main.Fsl)}, BifurcationKit.var"#136#137", Nothing, BifurcationKit.var"#130#131", Nothing, BifurcationKit.var"#134#135"{BifurcationKit.var"#130#131"}, BifurcationKit.var"#143#144"{BifurcationKit.var"#d1Fad#140"}, BifurcationKit.var"#147#148", BifurcationKit.var"#151#152", BifurcationKit.var"#155#156", Bool, Float64, BifurcationKit.Jet{Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing}}, Array{Float64, 1}, NamedTuple{(:r, :μ, :ν, :c3, :c5), NTuple{5, Float64}}, Accessors.PropertyLens{:r}, typeof(BifurcationKit.plot_default), typeof(BifurcationKit.record_sol_default), typeof(BifurcationKit.save_solution_default)}, BifurcationKit.DenseAnalytical, Array{Float64, 1}, Nothing, BifurcationKit.MeshCollocationCache{Float64}, BifurcationKit.POCollCache{Float64}}, Nothing, Nothing, Nothing, Accessors.PropertyLens{:r}, Nothing, Nothing}, Float64, Float64, BifurcationKit.DefaultLS, BifurcationKit.DefaultLS, BifurcationKit.MatrixBLS{Nothing}, BifurcationKit.MatrixBLS{Nothing}, LinearAlgebra.UniformScaling{Bool}}, Nothing, Nothing, Nothing, Accessors.PropertyLens{:c5}, Nothing, Nothing}, Nothing}, Tuple{Symbol}, NamedTuple{(:finalise_solution,), Tuple{BifurcationKit.Finaliser{BifurcationKit.FoldMAProblem{BifurcationKit.FoldProblemMinimallyAugmented{BifurcationKit.WrapPOColl{BifurcationKit.PeriodicOrbitOCollProblem{BifurcationKit.BifurcationProblem{BifurcationKit.BifFunction{typeof(Main.Fsl), BifurcationKit.var"#128#129"{typeof(Main.Fsl)}, BifurcationKit.var"#136#137", Nothing, BifurcationKit.var"#130#131", Nothing, BifurcationKit.var"#134#135"{BifurcationKit.var"#130#131"}, BifurcationKit.var"#143#144"{BifurcationKit.var"#d1Fad#140"}, BifurcationKit.var"#147#148", BifurcationKit.var"#151#152", BifurcationKit.var"#155#156", Bool, Float64, BifurcationKit.Jet{Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing}}, Array{Float64, 1}, NamedTuple{(:r, :μ, :ν, :c3, :c5), NTuple{5, Float64}}, Accessors.PropertyLens{:r}, typeof(BifurcationKit.plot_default), typeof(BifurcationKit.record_sol_default), typeof(BifurcationKit.save_solution_default)}, BifurcationKit.DenseAnalytical, Array{Float64, 1}, Nothing, BifurcationKit.MeshCollocationCache{Float64}, BifurcationKit.POCollCache{Float64}}, Nothing, Nothing, Nothing, Accessors.PropertyLens{:r}, Nothing, Nothing}, Float64, Float64, BifurcationKit.DefaultLS, BifurcationKit.DefaultLS, BifurcationKit.MatrixBLS{Nothing}, BifurcationKit.MatrixBLS{Nothing}, LinearAlgebra.UniformScaling{Bool}}, Nothing, Nothing, Nothing, Accessors.PropertyLens{:c5}, Nothing, Nothing}, Nothing}}}}, NamedTuple{(:r, :μ, :ν, :c3, :c5), NTuple{5, Float64}}, Accessors.PropertyLens{:r}, Accessors.PropertyLens{:c5}, BifurcationKit.FoldProblemMinimallyAugmented{BifurcationKit.BifurcationProblem{BifurcationKit.BifFunction{BifurcationKit.var"#1661#1662"{BifurcationKit.PeriodicOrbitOCollProblem{BifurcationKit.BifurcationProblem{BifurcationKit.BifFunction{typeof(Main.Fsl), BifurcationKit.var"#128#129"{typeof(Main.Fsl)}, BifurcationKit.var"#136#137", Nothing, BifurcationKit.var"#130#131", Nothing, BifurcationKit.var"#134#135"{BifurcationKit.var"#130#131"}, BifurcationKit.var"#143#144"{BifurcationKit.var"#d1Fad#140"}, BifurcationKit.var"#147#148", BifurcationKit.var"#151#152", BifurcationKit.var"#155#156", Bool, Float64, BifurcationKit.Jet{Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing}}, Array{Float64, 1}, NamedTuple{(:r, :μ, :ν, :c3, :c5), NTuple{5, Float64}}, Accessors.PropertyLens{:r}, typeof(BifurcationKit.plot_default), typeof(BifurcationKit.record_sol_default), typeof(BifurcationKit.save_solution_default)}, BifurcationKit.DenseAnalytical, Array{Float64, 1}, Nothing, BifurcationKit.MeshCollocationCache{Float64}, BifurcationKit.POCollCache{Float64}}}, BifurcationKit.var"#128#129"{BifurcationKit.var"#1661#1662"{BifurcationKit.PeriodicOrbitOCollProblem{BifurcationKit.BifurcationProblem{BifurcationKit.BifFunction{typeof(Main.Fsl), BifurcationKit.var"#128#129"{typeof(Main.Fsl)}, BifurcationKit.var"#136#137", Nothing, BifurcationKit.var"#130#131", Nothing, BifurcationKit.var"#134#135"{BifurcationKit.var"#130#131"}, BifurcationKit.var"#143#144"{BifurcationKit.var"#d1Fad#140"}, BifurcationKit.var"#147#148", BifurcationKit.var"#151#152", BifurcationKit.var"#155#156", Bool, Float64, BifurcationKit.Jet{Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing}}, Array{Float64, 1}, NamedTuple{(:r, :μ, :ν, :c3, :c5), NTuple{5, Float64}}, Accessors.PropertyLens{:r}, typeof(BifurcationKit.plot_default), typeof(BifurcationKit.record_sol_default), typeof(BifurcationKit.save_solution_default)}, BifurcationKit.DenseAnalytical, Array{Float64, 1}, Nothing, BifurcationKit.MeshCollocationCache{Float64}, BifurcationKit.POCollCache{Float64}}}}, BifurcationKit.var"#136#137", Nothing, BifurcationKit.var"#1273#1274"{BifurcationKit.PeriodicOrbitOCollProblem{BifurcationKit.BifurcationProblem{BifurcationKit.BifFunction{typeof(Main.Fsl), BifurcationKit.var"#128#129"{typeof(Main.Fsl)}, BifurcationKit.var"#136#137", Nothing, BifurcationKit.var"#130#131", Nothing, BifurcationKit.var"#134#135"{BifurcationKit.var"#130#131"}, BifurcationKit.var"#143#144"{BifurcationKit.var"#d1Fad#140"}, BifurcationKit.var"#147#148", BifurcationKit.var"#151#152", BifurcationKit.var"#155#156", Bool, Float64, BifurcationKit.Jet{Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing}}, Array{Float64, 1}, NamedTuple{(:r, :μ, :ν, :c3, :c5), NTuple{5, Float64}}, Accessors.PropertyLens{:r}, typeof(BifurcationKit.plot_default), typeof(BifurcationKit.record_sol_default), typeof(BifurcationKit.save_solution_default)}, BifurcationKit.DenseAnalytical, Array{Float64, 1}, Nothing, BifurcationKit.MeshCollocationCache{Float64}, BifurcationKit.POCollCache{Float64}}}, Nothing, BifurcationKit.var"#134#135"{BifurcationKit.var"#1273#1274"{BifurcationKit.PeriodicOrbitOCollProblem{BifurcationKit.BifurcationProblem{BifurcationKit.BifFunction{typeof(Main.Fsl), BifurcationKit.var"#128#129"{typeof(Main.Fsl)}, BifurcationKit.var"#136#137", Nothing, BifurcationKit.var"#130#131", Nothing, BifurcationKit.var"#134#135"{BifurcationKit.var"#130#131"}, BifurcationKit.var"#143#144"{BifurcationKit.var"#d1Fad#140"}, BifurcationKit.var"#147#148", BifurcationKit.var"#151#152", BifurcationKit.var"#155#156", Bool, Float64, BifurcationKit.Jet{Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing}}, Array{Float64, 1}, NamedTuple{(:r, :μ, :ν, :c3, :c5), NTuple{5, Float64}}, Accessors.PropertyLens{:r}, typeof(BifurcationKit.plot_default), typeof(BifurcationKit.record_sol_default), typeof(BifurcationKit.save_solution_default)}, BifurcationKit.DenseAnalytical, Array{Float64, 1}, Nothing, BifurcationKit.MeshCollocationCache{Float64}, BifurcationKit.POCollCache{Float64}}}}, BifurcationKit.var"#1663#1664"{BifurcationKit.PeriodicOrbitOCollProblem{BifurcationKit.BifurcationProblem{BifurcationKit.BifFunction{typeof(Main.Fsl), BifurcationKit.var"#128#129"{typeof(Main.Fsl)}, BifurcationKit.var"#136#137", Nothing, BifurcationKit.var"#130#131", Nothing, BifurcationKit.var"#134#135"{BifurcationKit.var"#130#131"}, BifurcationKit.var"#143#144"{BifurcationKit.var"#d1Fad#140"}, BifurcationKit.var"#147#148", BifurcationKit.var"#151#152", BifurcationKit.var"#155#156", Bool, Float64, BifurcationKit.Jet{Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing}}, Array{Float64, 1}, NamedTuple{(:r, :μ, :ν, :c3, :c5), NTuple{5, Float64}}, Accessors.PropertyLens{:r}, typeof(BifurcationKit.plot_default), typeof(BifurcationKit.record_sol_default), typeof(BifurcationKit.save_solution_default)}, BifurcationKit.DenseAnalytical, Array{Float64, 1}, Nothing, BifurcationKit.MeshCollocationCache{Float64}, BifurcationKit.POCollCache{Float64}}}, BifurcationKit.var"#1663#1664"{BifurcationKit.PeriodicOrbitOCollProblem{BifurcationKit.BifurcationProblem{BifurcationKit.BifFunction{typeof(Main.Fsl), BifurcationKit.var"#128#129"{typeof(Main.Fsl)}, BifurcationKit.var"#136#137", Nothing, BifurcationKit.var"#130#131", Nothing, BifurcationKit.var"#134#135"{BifurcationKit.var"#130#131"}, BifurcationKit.var"#143#144"{BifurcationKit.var"#d1Fad#140"}, BifurcationKit.var"#147#148", BifurcationKit.var"#151#152", BifurcationKit.var"#155#156", Bool, Float64, BifurcationKit.Jet{Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing}}, Array{Float64, 1}, NamedTuple{(:r, :μ, :ν, :c3, :c5), NTuple{5, Float64}}, Accessors.PropertyLens{:r}, typeof(BifurcationKit.plot_default), typeof(BifurcationKit.record_sol_default), typeof(BifurcationKit.save_solution_default)}, BifurcationKit.DenseAnalytical, Array{Float64, 1}, Nothing, BifurcationKit.MeshCollocationCache{Float64}, BifurcationKit.POCollCache{Float64}}}, BifurcationKit.var"#151#152", BifurcationKit.var"#155#156", Bool, Float64, BifurcationKit.Jet{Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing}}, BifurcationKit.SpecialPoint{Float64, NamedTuple{(:max, :min, :amplitude, :period), NTuple{4, Float64}}, Array{Float64, 1}, Array{Float64, 1}}, NamedTuple{(:r, :μ, :ν, :c3, :c5), NTuple{5, Float64}}, Accessors.PropertyLens{:r}, BifurcationKit.var"#1657#1658"{BifurcationKit.var"#1659#1660"{BifurcationKit.Branch{BifurcationKit.PeriodicOrbitCont, BifurcationKit.WrapPOColl{BifurcationKit.PeriodicOrbitOCollProblem{BifurcationKit.BifurcationProblem{BifurcationKit.BifFunction{typeof(Main.Fsl), BifurcationKit.var"#128#129"{typeof(Main.Fsl)}, BifurcationKit.var"#136#137", Nothing, BifurcationKit.var"#130#131", Nothing, BifurcationKit.var"#134#135"{BifurcationKit.var"#130#131"}, BifurcationKit.var"#143#144"{BifurcationKit.var"#d1Fad#140"}, BifurcationKit.var"#147#148", BifurcationKit.var"#151#152", BifurcationKit.var"#155#156", Bool, Float64, BifurcationKit.Jet{Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing}}, Array{Float64, 1}, NamedTuple{(:r, :μ, :ν, :c3, :c5), NTuple{5, Float64}}, Accessors.PropertyLens{:r}, typeof(BifurcationKit.plot_default), typeof(BifurcationKit.record_sol_default), typeof(BifurcationKit.save_solution_default)}, BifurcationKit.DenseAnalytical, Array{Float64, 1}, Nothing, BifurcationKit.MeshCollocationCache{Float64}, BifurcationKit.POCollCache{Float64}}, BifurcationKit.var"#1273#1274"{BifurcationKit.PeriodicOrbitOCollProblem{BifurcationKit.BifurcationProblem{BifurcationKit.BifFunction{typeof(Main.Fsl), BifurcationKit.var"#128#129"{typeof(Main.Fsl)}, BifurcationKit.var"#136#137", Nothing, BifurcationKit.var"#130#131", Nothing, BifurcationKit.var"#134#135"{BifurcationKit.var"#130#131"}, BifurcationKit.var"#143#144"{BifurcationKit.var"#d1Fad#140"}, BifurcationKit.var"#147#148", BifurcationKit.var"#151#152", BifurcationKit.var"#155#156", Bool, Float64, BifurcationKit.Jet{Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing}}, Array{Float64, 1}, NamedTuple{(:r, :μ, :ν, :c3, :c5), NTuple{5, Float64}}, Accessors.PropertyLens{:r}, typeof(BifurcationKit.plot_default), typeof(BifurcationKit.record_sol_default), typeof(BifurcationKit.save_solution_default)}, BifurcationKit.DenseAnalytical, Array{Float64, 1}, Nothing, BifurcationKit.MeshCollocationCache{Float64}, BifurcationKit.POCollCache{Float64}}}, 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1}}, NamedTuple{(:r, :μ, :ν, :c3, :c5), NTuple{5, Float64}}, Accessors.PropertyLens{:r}, BifurcationKit.var"#1657#1658"{BifurcationKit.var"#1659#1660"{BifurcationKit.Branch{BifurcationKit.PeriodicOrbitCont, BifurcationKit.WrapPOColl{BifurcationKit.PeriodicOrbitOCollProblem{BifurcationKit.BifurcationProblem{BifurcationKit.BifFunction{typeof(Main.Fsl), BifurcationKit.var"#128#129"{typeof(Main.Fsl)}, BifurcationKit.var"#136#137", Nothing, BifurcationKit.var"#130#131", Nothing, BifurcationKit.var"#134#135"{BifurcationKit.var"#130#131"}, BifurcationKit.var"#143#144"{BifurcationKit.var"#d1Fad#140"}, BifurcationKit.var"#147#148", BifurcationKit.var"#151#152", BifurcationKit.var"#155#156", Bool, Float64, BifurcationKit.Jet{Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, Nothing, ...`
---
### Author:  [@rveltz](https://discourse.julialang.org/u/rveltz)
#### Post date: [March 4, 2025, 11:41am UTC](https://discourse.julialang.org/t/investigate-long-compile-times/119019/12 "2025-03-04T11:41:57Z")
Thanks a lot for looking at this! I have two questions if I may.
A question of method because I might use your workflow for other functions:
- how did you get this ? What command? How can I use your hint?
A specific question to the problem:
- did you use the fact that [continuation\_coll\_fold](https://github.com/bifurcationkit/BifurcationKit.jl/blob/master/src/periodicorbit/codim2/PeriodicOrbitCollocation.jl#L110) yields large compile times whereas [continuation\_coll\_pd](https://github.com/bifurcationkit/BifurcationKit.jl/blob/master/src/periodicorbit/codim2/PeriodicOrbitCollocation.jl#L177) do not?
---
### Author:  [@kristoffer.carlsson](https://discourse.julialang.org/u/kristoffer.carlsson)
#### Post date: [March 4, 2025, 11:44am UTC](https://discourse.julialang.org/t/investigate-long-compile-times/119019/13 "2025-03-04T11:44:13Z")
> [@rveltz](#):
>
> How can I use your hint?
I used `--trace-compile=file.jl --trace-compile-timing` on 1.12 (the `1.12-nightly` juliaup channel), run the workload and look in `file.jl`.