Question About Clone Performance in Php8.5

[oleibman]

Description

This is a question, not an issue, but I didn't see a different way to ask. We have been running some benchmarks to test the performance of cloning a fairly large object vs. serialize/unserialize. On Win11, we see the surprising result that 8.5 clone runs in about 25-30% of the time that it takes for Php8.1/2/3/4. We didn't expect, and don't see, a significant change in serialize/unserialize. We are, of course, happy with this result, but somewhat puzzled. There doesn't seem to be anything in the change log which suggests that such an improvement is part of 8.5. Did I miss something there? Is there a change that didn't make it to the log? Is our application just lucky in this respect? I can provide more details if you need them.

PHP Version

PHP 8.5.0 (cli) (built: Nov 18 2025 08:17:59) (ZTS Visual C++ 2022 x64)
Copyright (c) The PHP Group
Zend Engine v4.5.0, Copyright (c) Zend Technologies
    with Zend OPcache v8.5.0, Copyright (c), by Zend Technologies

Operating System

Windows 11

[iluuu1994]

I don't recall optimizations regarding clone, but maybe @TimWolla remembers better. Also worth noting that every release contains various performance improvements that can collectively make a difference.