# Introduction to oneAPI.jl
**URL:** https://discourse.julialang.org/t/introduction-to-oneapi-jl/51054
**Category:** GPU
**Tags:** announcement, gpu, oneapi
**Created:** [December 1, 2020, 4:48pm UTC](https://discourse.julialang.org/t/introduction-to-oneapi-jl/51054 "2020-12-01T16:48:29Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@vchuravy](https://discourse.julialang.org/u/vchuravy)
#### Post date: [December 1, 2020, 4:48pm UTC](https://discourse.julialang.org/t/introduction-to-oneapi-jl/51054/1 "2020-12-01T16:48:29Z")
@maleadt is going to give a short introduction to his recent work on [oneAPI.jl](https://github.com/JuliaGPU/oneAPI.jl) at the next virtual JuliaGPU user call.
The next user call is at **Mon, December 7, 17:00 – 18:00 UTC** and the details on how to join can be found on the [Julia community calendar](https://julialang.org/community/#events).
---
### Author:  [@LaurentPlagne](https://discourse.julialang.org/u/LaurentPlagne)
#### Post date: [December 1, 2020, 9:21pm UTC](https://discourse.julialang.org/t/introduction-to-oneapi-jl/51054/2 "2020-12-01T21:21:06Z")
That is great !
I will give a short talk during an Intel oneAPI webinar (in french) in 2 days where I will introduce oneAPI.jl. The comparison between Julia and C++ is rather interesting for the following example:
```julia
using oneAPI# package Julia (new)
#x init
n = 10 ; x=rand(Float32,n) .- 0.5f0 # Array on CPU
xone=oneArray(x) # Array on GPU
res=mapreduce(abs,max,xone) #Array on GPU
```
Compared to :
```julia
template
float absmax(std::vector & X,Policy & policy){
const int N = X.size();
buffer X_buf{X.data(),range<1>(N)};
float result = std::transform_reduce(
policy,
oneapi::dpl::begin(X_buf),
oneapi::dpl::end(X_buf),
0.0f,
[](float a, float b) { return std::max(a, b); },
[](float x) { return abs(x); });
return result;
}
int main()
{
// X array init
const int N = 10000000;
std::vector X(N);
//Here I skip the random init in C++ ...
auto policy = oneapi::dpl::execution::make_device_policy(
queue(default_selector{},
dpc_common::exception_handler));
float result = absmax(X, policy);
}
```
Maybe suitable for the Julia/C++ comparison thread 😉
Anyway, Kudo again to @maleadt for his outstanding work !!
---
### Author:  [@vchuravy](https://discourse.julialang.org/u/vchuravy)
#### Post date: [December 7, 2020, 6:10pm UTC](https://discourse.julialang.org/t/introduction-to-oneapi-jl/51054/3 "2020-12-07T18:10:48Z")
The talk recording is available at [[JuliaGPU] A brief introduction to oneAPI.jl by Dr. Tim Besard - YouTube](https://www.youtube.com/watch?v=LQuI2nWvEK4)