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Thijs Feryn

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10 things that helped me advance my careerphpday 20252025-05-15
Ten concrete career moves: automate live demos with Ansible and Terraform then deliberately peel back automation to show failure modes; write a 778-page book…
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Caching the uncacheable in VarnishSREday London 20242024-09-19
Explains how Varnish turns otherwise uncacheable responses into cached assets by using VCL to strip tracking cookies, create hash variants and override TTLs…
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Caching the uncacheable in VarnishNDC Oslo 20242024-06-10
Shows how Varnish extends default behavior to cache personalized pages: extract and hash language or session cookie values, parse ESI fragments at the edge…
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10 things that helped me advance my careerPHP UK Conference 20242024-02-15
Seven time PHP UK attendee turns ten vague tips into concrete moves: built a personal site and YouTube videos that once hit several hundred thousand views…
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Distributed load testing with k6NDC London 20242024-01-29
k6 is used to run distributed load from geographically separate nodes (Ireland, US, Singapore) with a central control API on port 6565 that can…
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Distributed load testing with k6DevOps Barcelona Conference 20232023-11-09
k6 is an open‑source JS-based load tester that runs locally, on k6 cloud, or as custom binaries; distributed runs send real‑time metrics to Prometheus scraped…
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HTTP Headers that Make Your Website Go FasterSREcon23 Europe/Middle East/Africa2023-10-10
Shows how to use HTTP headers with Varnish Cache to cut origin load: claims 1.3 Tbps on one machine and 1.17 Gbps per watt as performance/efficiency proof…
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Caching the uncacheable: delivering personalized experiences without sacrificing performanceCopenhagen Developers Festival 20232023-08-28
Shows how Varnish turns personalization into cacheable work by using Varnish VCL to trim or keep specific cookies, create language-based cache variants, and…
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Taking Laravel to the edge with HTTP caching & VarnishLaracon EU 20222022-04-26
Varnish proves it can sit in front of Laravel and cut work by serving cached responses at 500 Gbps and handling 100k requests/sec on a single box; it honors…
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Controlling the VariablesPHP UK Conference 20192019-02-20
Argument: luck becomes manageable by identifying and controlling variables — mindset, empathy, effort, timing — and treating opportunities as processes not…
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Controlling The VariablesDutch PHP Conference 20182018-06-07
Claims that luck is controllable by finding and controlling the variables and gives concrete tactics: hustling to buy a sold-out Rolling Stones ticket (which…
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Build, provision & deploy in the Cloud with Packer, Ansible & TerraformPHP UK Conference 20182018-02-14
Bakes a Debian Stretch VM image with nginx and PHP via Packer builds AMIs (JSON config, snapshots registered like ef90ad1), provisions the image with Ansible…
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ElasticSearch in actionCodemotion Rome 20162016-03-18
A runnable demo indexes a company blog via an Atom‑feed script, shows explicit mappings (including English/Dutch/raw fields) to fix mistaken types, and walks…
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Reverse caching proxies: Varnish or Nginx?PHP UK Conference 20152015-02-18
Compares Varnish v4 and Nginx by showing real configs and tools: apt installs, ports, vcl back-end response overrides, nginx proxy_cache and fastcgi_cache…
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