# Delay Differential Equations Networks with different delay per edge

**URL:** https://discourse.julialang.org/t/delay-differential-equations-networks-with-different-delay-per-edge/69787
**Category:** Modelling & Simulations
**Tags:** diffeq, performance
**Created:** [October 14, 2021, 10:41pm UTC](https://discourse.julialang.org/t/delay-differential-equations-networks-with-different-delay-per-edge/69787 "2021-10-14T22:41:49Z")
**Posts on this page:** 1
**Showing post:** 23

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### Author: ![ChrisRackauckas](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/chrisrackauckas/32/77_2.png) [@ChrisRackauckas](https://discourse.julialang.org/u/ChrisRackauckas)
#### Post date: [May 12, 2022, 9:02am UTC](https://discourse.julialang.org/t/delay-differential-equations-networks-with-different-delay-per-edge/69787/23 "2022-05-12T09:02:07Z")

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Can you try the v1.8-beta3 and nightly to see if the allocations from the interpolations are gone?

[https://github.com/SciML/OrdinaryDiffEq.jl/issues/1502](https://github.com/SciML/OrdinaryDiffEq.jl/issues/1502)

Try the example from [Significant allocations with Callbacks (Tsit5)](https://discourse.julialang.org/t/significant-allocations-with-callbacks-tsit5/66467) . It’s the same problem as callbacks. That interpolation inference bug makes it so every use of the interpolations has allocations. In theory it was fixed by

[https://github.com/JuliaLang/julia/pull/43990](https://github.com/JuliaLang/julia/pull/43990)

it would be good to get a confirmation of that, since it should be on v1.8. If that’s fixed, then the rest should be much simpler.

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