# Fastest way to check for Inf or NaN in an array?

**URL:** https://discourse.julialang.org/t/fastest-way-to-check-for-inf-or-nan-in-an-array/76954
**Category:** General Usage
**Tags:** question, performance, arrays
**Created:** [February 23, 2022, 5:04am UTC](https://discourse.julialang.org/t/fastest-way-to-check-for-inf-or-nan-in-an-array/76954 "2022-02-23T05:04:30Z")
**Posts on this page:** 1
**Showing post:** 18

<div class="post-metadata">

### Author: ![Oscar\_Smith](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/oscar_smith/32/25343_2.png) [@Oscar\_Smith](https://discourse.julialang.org/u/Oscar_Smith)
#### Post date: [February 23, 2022, 5:53am UTC](https://discourse.julialang.org/t/fastest-way-to-check-for-inf-or-nan-in-an-array/76954/18 "2022-02-23T05:53:01Z")

</div>

With `LoopVectorization` you can go even faster.

```julia
function h(x)
    s = zero(eltype(x))
    @turbo for i in eachindex(x)
        s += x[i]*0
    end
    return isfinite(s)
end

```

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