1462397 - Introduce new telemetry probes for JSTerm

Status: RESOLVED WONTFIX

(DevTools :: Console, enhancement)

Description

[Jan Honza Odvarko [:Honza] (always need-info? me)]

In order to collect user/usage data related to JSTerm and measure success of new features we should introduce some telemetry probes.

I think we should mainly:
- Count number of executed expressions

We could perhaps also:
- Count how many times auto-completion is used to complete an expression.
- Count size of every executed expression and number of keystrokes to build it? 
- Count time used to build an expression. This might be tricky since the input line is focused all the time. We'd probably have to measure time in between individual keystrokes (note that auto-completion can make it faster)

This MDN page should be useful:
https://developer.mozilla.org/en-US/docs/Mozilla/Performance/Adding_a_new_Telemetry_probe


Honza

Comment 1

[Nicolas Chevobbe [:nchevobbe]]

Harald, we already landed a probe recording the number of lines of an evaluated expression.
Do you have an idea of what else we could measure here ?

Comment 2

[:Harald Kirschner :digitarald]

Afaik we got the critical interactions covered. Lets understand what we have and file more when we have actual questions that we need to answer.

I consider this done.

Comment 3

[Nicolas Chevobbe [:nchevobbe]]

See Comment 2