Your site should load as fast as possible. Even a 1 sec. delay in page response could result in a 7% reduction in conversions.
Is your site fast enough?
Even if you’re using a CDN to boost web performance, an underperforming CDN will still degrade your delivery. Testing is critical in determining a CDN’s actual performance and availability. Any CDN can claim to be “the fastest CDN on the planet,” but the only way to evaluate a CDN’s performance is to test and measure it consistently.
This guide will provide an overview of which metrics effectively evaluate CDN performance and availability and what tools to use to monitor your web performance—with or without a CDN (using Cedexis Radar and WebPageTest.org.)
The Best Metrics to Measure CDN Performance
-Throughput a/k/a Time To Last Byte (TTLB)
What’s the difference between TTFB and TTLB?
What causes a slow TTFB and TTLB?
-Overloaded origin server
-Geographic distance between request and content’s origin servers
Cedexis Radar and Real-User Monitoring (RUM)
-Many commercial services available: New Relic, Compuware Gomez, Dynatrace, Cedexis, SmartBear, Pingdom, Soasta, etc.
-Key Measurements: response time, throughput, error rate, page load time
-Generates actionable alerts
Tests: TTFB (HTTP Response Time) vs. TTLB (HTTP 100KB File Throughput Performance)
HTTP Response Time (TTFB)
HTTP 100KB Throughput/TTLB
Some web performance experts argue that TTFB is more important for the user than TTLB since web browsers may start displaying files as soon as the first bytes are received—for FEO optimization.
The goal is to get the last byte to the user as quickly as possible. Everything else is noise.
How does your web performance stack up? Contact us to schedule an appointment with our CDN experts, who can evaluate your needs and determine a custom-fit solution for you.