Monthly Performance Meeting: 2023

[fcollonval]

Here is a record of the agenda/minutes for our monthly meeting. Everyone is welcome to join.

As of April 2023 no more meeting are taking place

• When: Every 4 weeks Wednesday 10AM Pacific Time
• Where: jovyan Zoom

Let's avoid using this thread for discussion. If you'd like to discuss something in the minutes, open a separate issue and reference this thread.

Meeting notes from 2022 are there.

Meeting Notes

• 15 Mar 2023
• 15 Feb 2023
• 18 Jan 2023

[fcollonval]

18 January 2023

Attendees

Name	affiliation	github username
Frederic Collonval	QuantStack	@fcollonval
Vidar T Fauske	JP Morgan Chase	@vidartf
William Stein	SageMath, Inc	@williamstein
Michal Krassowski	Quansight	@krassowski

Notes

• Vidar

  • Large folders (1000s of items):
    • Browsing becomes slow -- There was previous discussions about changing the browser to something based on Max' effort on tree-finder (based on regular-table), but that stranded. I might be looking more on that, but timelines are uncertain and not sure what appetite is for switching default vs improving it?
      • Mike: interesting how it works with https://pypi.org/project/jupyterlab-unfold/
    • Does startup still always hit contents API with a "/" GET, or was that fixed?
      • Issues in Jupyter Server:
        • Pagination content

• Mike

  • Shadow DOM?
    Lumino issue
    Lumino PR

Discussion around web compontents adoption in the future in lumino/lab ecosystem:

• in future maybe a new alternative implementation of Widget which would be web-component based
• places where react is used poorly (too many roots), like toolbar buttons
• icons may be a good target for gradual adoption, may give a boost
  • svg <use>

Icons in Cocal: Iconfont and Antd icons
https://iconfont.cn
https://www.iconfont.cn/?lang=en-us
https://github.com/sagemathinc/cocalc/blob/master/src/packages/frontend/components/icon.tsx

[fcollonval]

15 February 2023

Name	affiliation	github username
Frederic Collonval	QuantStack	@fcollonval
Michal Krassowski	Quansight	@krassowski
Piyush Jain	AWS	@3coins

Notes

• Piyush

  • How to set up metrics for RTC? Best is to get in touch with Kevin Jahns (author of yjs)

• Frederic

  • I finally fix the benchmark jobs on JupyterLab CI
  • This leads to some additional correction to observable disposals
  • There is still a memory leak related to CodeMirror 6 that will be tackled in CodeMirror as token

• Mike

  • Nice blog post about CSS selector performance and a new dev tool available in Edge: https://blogs.windows.com/msedgedev/2023/01/17/the-truth-about-css-selector-performance/

[fcollonval]

15 March 2023

Name	affiliation	github username
Frederic Collonval	QuantStack	@fcollonval
William Stein	SageMath, Inc	@williamstein
Nicolas Brichet	QuantStack	@brichet

Notes

• Nicolas
  • Settings loading time issue
    Improves page loading time by reducing server requests related to settings jupyterlab#14195
    Optional argument to get only the schema names jupyterlab_server#385