From the NordicCDN blog
Performance, caching, security and the craft of running a fast website or webshop.
Brotli vs Gzip: which one should your server use?
Both shrink your text before it hits the wire, and both are basically free speed. The honest comparison — which compresses harder, which is faster, and why the answer depends on whether the file is cacheable.
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Black Friday readiness: making your shop survive the spike
Your shop runs fine for 364 days a year. Then Black Friday arrives, traffic goes 20x, and the wheels come off at the worst possible moment. Here is the timeline that prevents it.
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Do you need cookie consent for a CDN? Privacy myths, busted
Privacy questions about CDNs attract a lot of confident, wrong answers. Six of the most common, what is actually true, and the one myth that turns out not to be a myth at all.
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What is anycast, and why it makes your CDN faster
Anycast is one of those bits of networking magic that quietly makes the modern web fast. What it is, how it actually works, and the question everyone asks when they first hear about it.
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What is a WAF, and does your site really need one?
A web application firewall sounds like enterprise overkill until the day it quietly blocks the attack that would have ruined your week. What a WAF does, what it cannot do, and who actually needs one.
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Core Web Vitals in 2026: LCP, INP and CLS without the jargon
Three acronyms decide a chunk of how Google ranks you and how your site feels to use. Here is what LCP, INP and CLS really measure — and, for each, the change that moves the number most.
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How to speed up a slow WordPress site (without a single plugin)
WordPress out of the box is slow for boring, fixable reasons. Here is the order to fix them in — highest impact first — by moving work to the edge rather than stacking more plugins on top.
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GDPR and CDNs: keeping European data in Europe
A CDN sits between your visitors and your site, which means it handles their data. What GDPR actually asks of you, why the transfer question is the awkward one, and the short way to avoid it.
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HTTP/3 and QUIC, explained (and why your site feels faster)
Every few years the web gets a new version of HTTP, and HTTP/3 is the biggest change in a while — it threw out TCP entirely. What that means in plain terms, and why your phone notices more than your desktop.
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