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Questions - flamegraph

How to kill perf record with python subprocess?

I am attempting to use the perf utility to monitor my system. It will be started and killed within a python script. I have created a sandbox like so: extra_params = ["-F", "99", &q...
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David Owens

python

performance

monitoring

perf

flamegraph

Votes: 0

Answers: 0

How to find out which hook has changed with the help of hook number/index displayed in FlameGraph

I'm working on a react application and want to improve the performance. I was using the Profiler to see the components painted on each render and also FlameGraph to find out which one is taking long t...
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praveen guda

reactjs

performance

react-hooks

profiler

flamegraph

Votes: 0

Answers: 1

Latest Answer

If you check the "Components" React Dev Tools tab (to the left of Profile) you can find the component in question and see the numbered hooks. I believe that is the correct relation.
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Jason

What is the vertical line in Datadog APM trace

I'm not sure how to interpret the long vertical line in Datadog APM Traces
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AdrianS

trace

metrics

datadog

telemetry

flamegraph

Votes: 0

Answers: 1

Latest Answer

That indicates the span was called asynchronously This doc talks about python, but it's true if all languages: https://www.datadoghq.com/blog/tracing-async-python-code/
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draav

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