# Extremely high first call latency Julia 1.6 versus 1.5 with multiphysics PDE solver

**URL:** <https://discourse.julialang.org/t/extremely-high-first-call-latency-julia-1-6-versus-1-5-with-multiphysics-pde-solver/71692>\
**Category:** Performance\
**Tags:** question\
**Created:** [November 17, 2021, 11:33pm UTC](https://discourse.julialang.org/t/extremely-high-first-call-latency-julia-1-6-versus-1-5-with-multiphysics-pde-solver/71692 "2021-11-17T23:33:43Z")\
**Posts on this page:** 1\
**Showing post:** 24

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**Author:** ![goerch](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/goerch/32/29122_2.png) [@goerch](https://discourse.julialang.org/u/goerch)\
**Post date:** [November 26, 2021, 8:06am UTC](https://discourse.julialang.org/t/extremely-high-first-call-latency-julia-1-6-versus-1-5-with-multiphysics-pde-solver/71692/24 "2021-11-26T08:06:07Z")

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Hi @fverdugo,

my first suspicion would be that the increased compile time is due to _new_ optimizations. So I’d expect a discussion about missed optimizations next, of course;)

Will check the example from [here](https://discourse.julialang.org/t/how-to-cut-down-compile-time-when-inference-is-not-the-problem/59077) with `@btime` next.

Edit: done.

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