# On OS X Catalina, running 'solve' in DifferentialEquations causes crash

**URL:** https://discourse.julialang.org/t/on-os-x-catalina-running-solve-in-differentialequations-causes-crash/42109
**Category:** General Usage
**Created:** [June 26, 2020, 2:45pm UTC](https://discourse.julialang.org/t/on-os-x-catalina-running-solve-in-differentialequations-causes-crash/42109 "2020-06-26T14:45:46Z")
**Posts on this page:** 1
**Showing post:** 16

<div class="post-metadata">

### Author: ![perseid28](https://avatars.discourse-cdn.com/v4/letter/p/3ab097/32.png) [@perseid28](https://discourse.julialang.org/u/perseid28)
#### Post date: [June 27, 2020, 9:30am UTC](https://discourse.julialang.org/t/on-os-x-catalina-running-solve-in-differentialequations-causes-crash/42109/16 "2020-06-27T09:30:58Z")

</div>

For Example 3 from that tutorial page I linked on the first page, it appears 1.4.2 runs significantly faster:

```julia
julia> @btime solve(prob);
  101.799 μs (3991 allocations: 112.48 KiB)

julia> @btime solve(prob);
  102.888 μs (3991 allocations: 112.48 KiB)

julia> versioninfo()
Julia Version 1.4.2

```

```julia
julia> @btime solve(prob);
  660.923 μs (3989 allocations: 113.94 KiB)

julia> @btime solve(prob);
  658.327 μs (3989 allocations: 113.94 KiB)

julia> versioninfo()
Julia Version 1.6.0-DEV.306

```

And for your sum code:

```julia
julia> @btime mysum($x)
  6.459 ns (0 allocations: 0 bytes)
59.37744793932639

julia> versioninfo()
Julia Version 1.4.2

```

```julia
julia> @btime mysum($x)
  6.332 ns (0 allocations: 0 bytes)
66.60390799012274

julia> versioninfo()
Julia Version 1.6.0-DEV.306

```

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