# Interpretation of Juno's profiler visualization
**URL:** https://discourse.julialang.org/t/interpretation-of-junos-profiler-visualization/35810
**Category:** Juno
**Tags:** question, profiling
**Created:** [March 10, 2020, 7:31pm UTC](https://discourse.julialang.org/t/interpretation-of-junos-profiler-visualization/35810 "2020-03-10T19:31:37Z")
**Posts on this page:** 2
**Page:** 1
### Author:  [@benninkrs](https://discourse.julialang.org/u/benninkrs)
#### Post date: [March 10, 2020, 7:31pm UTC](https://discourse.julialang.org/t/interpretation-of-junos-profiler-visualization/35810/1 "2020-03-10T19:31:38Z")
In spite of having used Juno for a while, I have only just recently started using its profiler visualization, which I find very nice. However I do have a couple questions about how to interpret the visualization:
1. The [documentation](http://docs.junolab.org/stable/man/juno_frontend/index.html#Profiler-1) states that in the flamechart, yellow means dynamic dispatch and red means garbage collection. But I also see blue boxes. What does blue mean? Allocation?
2. In the source code, I see yellow bars on both function calls and function declarations. I understand the former – it means the call was dispatched dynamically – but what does yellow on a function declaration mean?
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### Author:  [@pfitzseb](https://discourse.julialang.org/u/pfitzseb)
#### Post date: [March 11, 2020, 10:07am UTC](https://discourse.julialang.org/t/interpretation-of-junos-profiler-visualization/35810/2 "2020-03-11T10:07:46Z")
> [@benninkrs](#):
>
> But I also see blue boxes. What does blue mean? Allocation?
Blue boxes mean that we didn’t detect GC events or dynamic dispatch.
> [@benninkrs](#):
>
> but what does yellow on a function declaration mean?
Probably that Julia’s profiler reported the wrong line, although there’s a chance that it got attributed to e.g. the kwarg wrapper doing dynamic dispatch.