Starting as early as at least 2022-10-26, users may experience a significant performance degradation when enabling HTTP/3 on their sites. Users are advised to disable HTTP/3 for better performance.
Update: Improvements have been made to HTTP/3 performance recently that greatly reduce the impact of this regression.
Cloudflare is investigating issues with network performance in ARN, AMS, ATL, EWR, ORD, DFW, FRA, GRU, MXP. We are working to analyse and mitigate this problem. More updates to follow shortly.
Posted Dec 02, 2024 - 18:05 UTC
This incident affected: Europe (Amsterdam, Netherlands - (AMS), Frankfurt, Germany - (FRA), Milan, Italy - (MXP), Stockholm, Sweden - (ARN)), North America (Atlanta, GA, United States - (ATL), Chicago, IL, United States - (ORD), Dallas, TX, United States - (DFW), Newark, NJ, United States - (EWR)), Latin America & the Caribbean (São Paulo, Brazil - (GRU)), and Cloudflare Sites and Services (R2).