User-centric Metrics Matter to Ecommerce. Start with These Five.
Rigor
JULY 11, 2019
Basically, TTFB is a measure of back-end and network performance. Web Developer Programs Engineer at Google Rick Viscomi , the thresholds for fast/average/slow TTFB are 200 ms at the upper limit and 1000 ms at the lower limit. <200 ms “fast” TTFB is based on the server responsiveness best practice recommendation.
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