PHP 8.5 JIT Deep Tuning: tracing vs function vs off — Full Comparison (2026)
After our initial JIT on/off benchmark and the I/O‑sensitive workload analysis, many readers asked two specific questions: Which JIT mode (tracing vs function) delivers the best real‑world performance? and Does the JIT behaviour differ between traditional PHP‑FPM, long‑running application servers like RoadRunner, and event‑driven servers like Swoole? This article answers exactly those questions. This PHP … Read more