The Internet Archive discovers in real-time when WordPress blogs publish a new post, and when Wikipedia articles reference new sources. How does that work?Continue reading "How does Internet Archive know?".
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Profiling PHP in production at scale
At Wikipedia, we built an efficient sampling profiler for PHP, and use it to instrument live requests. The trace logs and flame graphs are powered by a simple setup that involves only free open-source software, and runs at low infrastructure cost.Continue reading "Profiling PHP in production at scale".
How to protect yourself from npm
What’s the worst that could happen after npm install?Continue reading "How to protect yourself from npm".
Measuring Wikipedia page load times
This post shows how we measure and interpret load times on Wikipedia. It also explains what real-user metrics are, and how percentiles work.Continue reading "Measuring Wikipedia page load times".