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In this paper, we study how web-server architecture and implementation affect performance when trying to obtain high throughput on a 4-core system servicing static content. We focus on static content as a growing numbers of servers are dedicated to workloads comprised of songs, photos, software, and videos chunked for HTTP downloads. Two representative static-content workloads are used: one serviced entirely from the file-system cache and the other requires significant disk I/O. We focus on 4-core systems as: 1) it is a widely used configurations in data-centers and cloud services, 2) recent studies show large SMP systems may operate more efficiently when subdivided into smaller subsystems, 3) understanding performance with a smaller number of cores is essential before scaling to a larger number of cores, 4) and 4-cores may be sufficient for many web servers. Two high-performance web-servers, with event-driven (μserver) and pipelined (WatPipe) architectures, are developed and tested for a multi-core environment. By carefully implementing and tuning the two web-servers, both achieve performance comparable to running independent copies of the server on each processor (N-copy). The new web-servers achieve high throughput (4,000--6,000 Mbps) with 40,000 to 70,000 connects/second; performance in all cases is better than nginx, lighttpd, and Apache. We conclude that implementation and tuning of web servers is perhaps more important than server architecture. We also find it is better to use blocking rather than non-blocking calls to sendfile, when the requested files do not all fit in the file-system cache.