# Issue with PDMP and Forwardiff - DifferentialEquation

**URL:** <https://discourse.julialang.org/t/issue-with-pdmp-and-forwardiff-differentialequation/17925>\
**Category:** Performance\
**Tags:** diffeq\
**Created:** [November 23, 2018, 8:17pm UTC](https://discourse.julialang.org/t/issue-with-pdmp-and-forwardiff-differentialequation/17925 "2018-11-23T20:17:25Z")\
**Posts on this page:** 1\
**Showing post:** 10

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**Author:** ![rveltz](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/rveltz/32/2707_2.png) [@rveltz](https://discourse.julialang.org/u/rveltz)\
**Post date:** [July 30, 2019, 12:21pm UTC](https://discourse.julialang.org/t/issue-with-pdmp-and-forwardiff-differentialequation/17925/10 "2019-07-30T12:21:26Z")

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> [@rveltz](#):
>
> I don’t really get the number (like why `tau=x[end]` seems to generate allocations )

It seems linked to [Memory allocation tracking](https://discourse.julialang.org/t/memory-allocation-tracking/21597)

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