Primary & Secondary Bidders

[bsardo]

This feature request originated from PMC discussions on #4416 and is similar to the primary/secondary bidder feature in PBJS. The purpose of this feature is to improve performance, specifically in the situation where a bidder is responding with a 2xx status code within the allotted time (no timeout) but is slow to respond.

Bidders may be classified as either primary or secondary.
If a bidder is classified as primary, Prebid Server will wait for its response before proceeding with the auction.
If a bidder is classified as secondary, Prebid Server will not wait for its response before proceeding with the auction.
This means that only those responses that are received before the last primary bidder responds are considered in the auction.

The initial ask is to add this capability as an account-level config so that each account may specify primary and secondary bidders. If not specified, all bidders default to primary.
TBD on the field name.

A potential future enhancement is to add a similar request-level config.

[Net-burst]

It appears there is already an open issue for this: #2620