01393nas a2200181   4500000000100000008004100001260001200042100002800054700002400082700002400106700001700130245010300147856004200250300000700292490000600299520089200305022001401197       2020                            d  c01/20201 aEduardo Gómez-Sánchez1 aDiego Bores-Quijano1 aMiguel Bote-Lorenzo1 aRoc Meseguer00aEstimation of Web Proxy Response Times in Community Networks Using Matrix Factorization Algorithms  uhttps://www.mdpi.com/2079-9292/9/1/88  a880 v93 aIn community networks, users access the web using a proxy selected from a list, normally without regard to its performance. Knowing which proxies offer good response times for each client would improve the user experience when navigating, but would involve intensive probing that would in turn cause performance degradation of both proxies and the network. This paper explores the feasibility of estimating the response times for each client/proxy pair by probing only a few of the existing pairs and then using matrix factorization. To do so, response times are collected in a community network emulated on a testbed platform, then a small part of these measurements are used to estimate the remaining ones through matrix factorization. Several algorithms are tested; one of them achieves estimation accuracy with low computational cost, which renders its use feasible in real networks.  a2079-9292