Two Streams, No Join 43 Tech Dives Measurement Your Pipeline Prebid.js Stitch + Transform Prebid Server Dashboard 1 JS events 2 AuctionObj 3 join + agg 4 config tune P_
Two Streams, No Join Tech Dives Measurement 43 Two event streams, no bridge: JS events from the browser 1 and AuctionObject s from PBS 2 use different schemas with no built-in join. Your pipeline stitches them on auctiontimestamp + pbsBidId 3 . That pipeline IS the product — without it, PBS knows who bid but not who saw the ad; the browser knows renders but not why others lost 8 14 . FIELD NOTES → Default batchSize=1: one HTTP per event, 40+ requests per auction → bidWon fires before render; 15-20% of won ads never display P_ atd.postindustria.com/43

How It Works

Two event streams, no bridge: JS events from the browser [1] and `AuctionObject`s from PBS [2] use different schemas with no built-in join. Your pipeline stitches them on `auctiontimestamp` + `pbsBidId` [3]. That pipeline IS the product — without it, PBS knows who bid but not who saw the ad; the browser knows renders but not why others lost {8} {14}.

Field Notes

  • Default `batchSize`=1: one HTTP per event, 40+ requests per auction
  • `bidWon` fires before render; 15-20% of won ads never display

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