Sciweavers

Share
INFOCOM
2000
IEEE

Prefetching the Means for Document Transfer: A New Approach for Reducing Web Latency

11 years 10 months ago
Prefetching the Means for Document Transfer: A New Approach for Reducing Web Latency
User-perceived latency is recognized as the central performance problem in the Web. We systematically measure factors contributing to this latency, across several locations. Our study reveals that DNS query times, TCP connection establishment, and start-of-session delays at HTTP servers, more so than transmission time, are major causes of long waits. Wait due to these factors also afflicts high-bandwidth users and has detrimental effect on perceived performance. We propose simple techniques that address these factors: (i) pre-resolving host-names (pre-performing DNS lookup), (ii) preconnecting (prefetching TCP connections prior to issuance of HTTP request), and (iii) pre-warming (sending a “dummy” HTTP HEAD request to Web servers). Trace-based simulations demonstrate a potential to reduce perceived latency dramatically. Our techniques surpass document prefetching in performance improvement per bandwidth used and can be used with non-prefetchable URLs. Deployment of these techniqu...
Edith Cohen, Haim Kaplan
Added 31 Jul 2010
Updated 31 Jul 2010
Type Conference
Year 2000
Where INFOCOM
Authors Edith Cohen, Haim Kaplan
Comments (0)
books