# Interpreting TuringBenchmarking.jl output?

**URL:** <https://discourse.julialang.org/t/interpreting-turingbenchmarking-jl-output/119356>\
**Category:** Statistics\
**Created:** [September 12, 2024, 11:14pm UTC](https://discourse.julialang.org/t/interpreting-turingbenchmarking-jl-output/119356 "2024-09-12T23:14:50Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![rkube](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/rkube/32/211198_2.png) [@rkube](https://discourse.julialang.org/u/rkube)\
**Post date:** [September 12, 2024, 11:14pm UTC](https://discourse.julialang.org/t/interpreting-turingbenchmarking-jl-output/119356/1 "2024-09-12T23:14:50Z")

</div>

Hi,  
I’m trying to benchmark a turing model as described [here](https://turinglang.org/TuringBenchmarking.jl/dev/) and it’s not really clear to me what the output means:

```julia
2-element BenchmarkTools.BenchmarkGroup:
  tags: []
  "evaluation" => 2-element BenchmarkTools.BenchmarkGroup:
          tags: []
          "linked" => Trial(110.125 μs)
          "standard" => Trial(70.416 μs)
  "gradient" => 4-element BenchmarkTools.BenchmarkGroup:
          tags: []
          "AutoReverseDiff(compile=true)" => 2-element BenchmarkTools.BenchmarkGroup:
                  tags: ["ReverseDiff [compiled]"]
                  "linked" => Trial(5.372 ms)
                  "standard" => Trial(1.294 ms)
          "AutoForwardDiff(chunksize=0)" => 2-element BenchmarkTools.BenchmarkGroup:
                  tags: ["ForwardDiff"]
                  "linked" => Trial(96.739 ms)
                  "standard" => Trial(49.003 ms)
          "AutoReverseDiff()" => 2-element BenchmarkTools.BenchmarkGroup:
                  tags: ["ReverseDiff"]
                  "linked" => Trial(29.593 ms)
                  "standard" => Trial(3.229 ms)
          "AutoZygote()" => 2-element BenchmarkTools.BenchmarkGroup:
                  tags: ["Zygote"]
                  "linked" => Trial(96.555 ms)
                  "standard" => Trial(21.833 ms)

```

What is the difference between `linked` and `standard`?

---

<div class="post-metadata">

**Author:** ![eteppo](https://avatars.discourse-cdn.com/v4/letter/e/90db22/32.png) [@eteppo](https://discourse.julialang.org/u/eteppo)\
**Post date:** [February 15, 2025, 6:13pm UTC](https://discourse.julialang.org/t/interpreting-turingbenchmarking-jl-output/119356/2 "2025-02-15T18:13:01Z")

</div>

Looking at the source this has something to do with `DynamicPPL.link`/`Bijectors.link` and transforming parameters from constrained to unconstrained spaces.