# Sincos slightly slower than sin and cos

**URL:** <https://discourse.julialang.org/t/sincos-slightly-slower-than-sin-and-cos/73207>\
**Category:** Performance\
**Tags:** trigonometry\
**Created:** [December 16, 2021, 3:10pm UTC](https://discourse.julialang.org/t/sincos-slightly-slower-than-sin-and-cos/73207 "2021-12-16T15:10:06Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![markmbaum](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/markmbaum/32/32745_2.png) [@markmbaum](https://discourse.julialang.org/u/markmbaum)\
**Post date:** [December 16, 2021, 3:10pm UTC](https://discourse.julialang.org/t/sincos-slightly-slower-than-sin-and-cos/73207/1 "2021-12-16T15:10:06Z")

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I have some pieces of code that require lots of `sin` and `cos` evaluations and I’m looking for ways to accelerate. I noticed that the `sincos` function seems slightly slower than calling `sin` and `cos` alone.

```julia
julia> using BenchmarkTools

julia> x = rand(1000);

julia> @btime map(sincos, $x);
  7.725 μs (1 allocation: 15.75 KiB)

julia> @btime map(y->(sin(y),cos(y)), $x);
  6.975 μs (1 allocation: 15.75 KiB)

```

Is the `sincos` function just for convenience? Is there a standard way of speeding up trigonometry?

(I just upgraded to Julia 1.7.0)

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<div class="post-metadata">

**Author:** ![jling](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/jling/32/212909_2.png) [@jling](https://discourse.julialang.org/u/jling)\
**Post date:** [December 16, 2021, 3:12pm UTC](https://discourse.julialang.org/t/sincos-slightly-slower-than-sin-and-cos/73207/2 "2021-12-16T15:12:42Z")

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[https://github.com/JuliaLang/julia/issues/43365](https://github.com/JuliaLang/julia/issues/43365)

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<div class="post-metadata">

**Author:** ![markmbaum](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/markmbaum/32/32745_2.png) [@markmbaum](https://discourse.julialang.org/u/markmbaum)\
**Post date:** [December 16, 2021, 3:14pm UTC](https://discourse.julialang.org/t/sincos-slightly-slower-than-sin-and-cos/73207/3 "2021-12-16T15:14:32Z")

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Oh ok, I didn’t see that 😇. Thanks.