[Mentorship Diary] Princiya and Stephen

[Bamieh]

[Mentorship Diary] Princiya and Stephen

(Mentorship Round 1) Stephen will be mentoring Princiya on diagnostics.

[Qard]

Kickoff meeting (5 August 2018)

Youtube meeting recording: https://youtu.be/FmAcQiqKp1A

Scope Introduction

Stephen will be mentoring about diagnostics, with focus on time-travel debugging and tooling around the CPU profiler.

The Diagnostics Working Group leads various initiatives to improve the facilities for
understanding what goes on within a Node.js application. They maintain several tools
and parts of Node.js core code to support those needs.

Goals & Expectations

• Learn about CPU Profiler output and identify useful ways to visualize the output data
• Learn about Time-Travel Debugging and how to get involved in moving that forward

Availability

Meeting times will be coordinated through Slack. Stephen is available mostly any time except Tuesday and Wednesday mornings. The meetings will (probably) be on Zoom.

Privacy & CoC

We are both comfortable recording sessions and will record sessions and link to them on github.

[Qard]

Meeting 2 (August 8, 2018)

Forgot to record the meeting, sadly. I'll remember next time. 😓

• Discussed node --inspect and using Chrome Dev Tools
• Introduced the v8-profiler module
• Introduced async_hooks

Princiya will experiment with v8-profiler and async_hooks and consider novel ways to connect the two to capture multiple profiles and connect them together.

[Qard]

Meeting 3 (August 23, 2018)

Discussed:

• How sampling profilers work
• How garbage collectors track memory
• How async_hooks correlates callbacks of async tasks to the point at which it was called, and the benefits

Princiya has decided to write a blog post about things that might not be as clear to someone outside of the diagnostics bubble. It should be a big help for introducing people to the subject of diagnostics. 🎉

[Qard]

Meeting 4 (September 12, 2018)

Discussed:

• Currently active development (trace_events, async_hooks destroy/resource ideas)
• Differences with Firefox dev tools
• Needs of Diagnostics WG in terms of documentation, outreach, etc.

I will continue to work with Princiya to make the Diag WG more approachable and to encourage more community involvement.

[princiya]

Here is my first blog post: https://princiya777.wordpress.com/2018/09/09/node-js-diagnostics/

[Bamieh]

@princiya oh wow amazing read, I love the drawings!

Do you mind if we share it on twitter?

[princiya]

@Bamieh please do. thanks.

[saulonunesdev]

@Qard Confirmed that this mentoring has ended and the diary was drafted to markdown under mentorship-diaries folder