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2 docs tagged with "timeseries"

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Price Tracking Service

Adaptive polling to make 500M products affordable, headless browser pools against anti-bot defences, percolator queries for alert fan-out, price extraction from heterogeneous pages, and time-series storage.

Strava — Activity Tracking

Polyline segment matching with R-trees and Fréchet distance, FIT file ingestion spikes, leaderboards in sorted sets, GPS and elevation noise, privacy zones, and anti-cheat.