Website Speed Test Articles

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Why a 95 Website Speed Score Doesn't Mean Real Users Experience It as Fast — Lab Data vs Field Data

Why a 95 Website Speed Score Doesn't Mean Real Users Experience It as Fast — Lab Data vs Field Data

A website scoring 95 in a lab speed test can still feel slow to real users — lab tests run on powerful servers with fast connections and empty caches, while real users are on phones, on 4G, seeing your site for the first time. Here's the lab vs field data distinction, what LCP/INP/CLS actually measure, why slow TTFB sets a floor no client-side fix can overcome, and the specific changes that move each Core Web Vital the most.

Jun 17, 2026
Bufferbloat: Why a 300 Mbps Speed Test Result Can Coexist With Terrible Video Call Quality

Bufferbloat: Why a 300 Mbps Speed Test Result Can Coexist With Terrible Video Call Quality

A speed test showing 300 Mbps can coexist with terrible video call quality — because throughput and latency-under-load are different things, and bufferbloat is specifically a latency problem that high throughput doesn't fix. Here's how oversized buffers interact with TCP to cause latency spikes under load, why AQM algorithms like CoDel and CAKE fix this, and how to actually test for it.

Jun 17, 2026
Why Your Speed Test Looks Fine but Everything Still Feels Slow

Why Your Speed Test Looks Fine but Everything Still Feels Slow

High speed test numbers don't guarantee fast internet. Latency, bufferbloat, WiFi overhead, and ISP congestion all affect real-world performance in ways throughput tests don't capture. Here's how to read speed test results and diagnose actual slowness.

Jun 9, 2026