CDN ROI & Savings Calculator

In digital infrastructure, Time to First Byte (TTFB) directly correlates to user abandonment and conversion loss. The 100ms Rule—derived from longitudinal industry studies and A/B latency profiling—states that for every 100ms of latency added, conversion rates decline by approximately 1%. This model utilizes that 1% coefficient as a conservative, defensible anchor for revenue recapture.

This audit model utilizes a conservative 1% revenue recapture coefficient per 100ms improvement. For high-traffic, revenue-generating applications, the performance-driven conversion lift often exceeds the direct egress savings from bandwidth offload. Infrastructure offload and egress penalties are only half the equation; the latency-revenue correlation completes the unit economics of edge delivery.

A high Cache Hit Ratio does not merely reduce bandwidth costs. It also reduces the CPU and RAM burden on origin servers. Every request served from the edge is a request that never reaches the origin—eliminating compute cycles, memory overhead, and TCP connection concurrency.

This edge-tier remediation is often overlooked in infrastructure ROI models. Origin infrastructure can be architecturally de-scoped when traffic is offloaded to the edge. The combination of egress savings and compute offload yields a compound benefit: lower bandwidth bills and lower compute costs. For applications with variable or spiky traffic, this dual effect is especially pronounced.

Utilize this audit framework as a baseline for primary bandwidth economies. For a complete picture, add the cost of origin compute that would otherwise be required to serve traffic now handled by the edge.