2031568 - Add new normalization method for inferred interest vector

Status: RESOLVED FIXED

(Firefox :: New Tab Page, enhancement)

Description

[rrando]

In our inferred model, we’ve tried non-normalized and normalized interest vectors.

We’re transitioning back to non-normalized with a desire to have some sort of blend implemented in the future on the client.

We add a new ctrPriorStrength that can be passed from Merino as part of the model configs that activates the new feature.

The new process is as follows:
Get a normalized CTR for all tiles based on all impressions/clicks based on looking at impressions/clicks for all possible topics.
For each feature, get the ctr of that feature relative this normalized ctr. A ctrPriorStrength constant is added so for few impressions the normalized ctr is going to be 1.
Threshold as normal using default thresholds passed from feature model

Comment 1

[rrando]

Attachment: Bug 2031568 - Add bayes smoothing with normalization method for computing inferred interest vector for New Tab

Comment 2

[Pulsebot]

Pushed by [e-mail]:
https://github.com/mozilla-firefox/firefox/commit/152842e95dde
https://hg.mozilla.org/integration/autoland/rev/597860913185
Add bayes smoothing with normalization method for computing inferred interest vector for New Tab r=mlplyler,home-newtab-reviewers,thecount

Comment 3

[rperta]

https://hg.mozilla.org/mozilla-central/rev/597860913185