Issue link: https://read.uberflip.com/i/1146286
Parallel Downloads | 47 parallel per hostname. Figure 6-3 shows that Firefox's settings for HTTP/1.0 result in the fastest response time for this hypothetical page. It's even faster than that shown in Figure 6-2, even though only one hostname is used. Most web sites today use HTTP/1.1, but the idea of increasing parallel downloads beyond two per hostname is intriguing. Instead of relying on users to modify their browser settings, frontend engineers could simply use CNAMEs (DNS aliases) to split their components across multiple hostnames. Maximizing parallel downloads doesn't come without a cost. Depending on your bandwidth and CPU speed, too many parallel downloads can degrade performance. Research at Yahoo! shows that Figure 6-2. Downloading four components in parallel Figure 6-3. Downloading eight components in parallel (default for Firefox HTTP/1.0) html component component component component component component component component component component html component component component component component component component component component component