PHP Performance Demystified - Measure, Understand, Optimise

on YouTube ↗39m

" summary

Shows concrete claims and reproducible numbers not vague promises: boot time ~40 ms, opcache default entries 16,183 and can be raised to 100,000, JIT helps long‑running jobs but not short web requests, sprintf gets a 6× speedup between PHP 8.3 and 8.4 when optimized, and some workloads see 20–50% improvements from opcache optimizations. Demonstrates measurement tools like Hyperfine and PHP SPX, uses flamegraphs and sampling versus instrumentation, fixes include autoloader preloading for PHPUnit and verification that changes actually reduce CPU or memory.

AI-written summary · about

" chapters (10)

1. 0:00Introduction
2. 1:50PHP execution flow
3. 7:12OPcache and JIT
4. 10:04Benchmarking PHP
5. 15:25Performance bottlenecks
6. 17:08Benchmarking tools
7. 23:51Profiling PHP
8. 27:44PHP-SPX insights
9. 30:12Optimizing PHP app
10. 31:14Q&A

" related talks

• 01h 02mSpeeding up the Web with PHP 7Rasmus Lerdorf · FrOSCon 2015
• 43mSpeeding up the Web with PHP 7Rasmus Lerdorf · Codemotion Milan 2015
• 01h 12m25 Years of PHPRasmus Lerdorf · phpDay 2019
• 42mThe PHP 7 Story, and beyondZeev Suraski · PHP fwdays'17
• 31mPHP in 2018Rasmus Lerdorf · .concat() 2018
• 50mPerformance optimization: how do I go about it?Kasia Zien · Laracon EU 2019
• 52mPerformance optimisation: how do I go about it?Kat Zień · PHP UK Conference 2018
• 18mMy Take on PHPFabien Potencier · dotScale 2013