Florian Engelhardt

Proud dad of 👧🧒🧒🧒👧👧, Coder, Author, Speaker, Geek.
Vim, PHP 🐘, Rust 🦀, OpenSource!
PHP Profiling @datadoghq
@[email protected]

[Florian Engelhardt @realFlowControl]

@alexdaubois @OndrejMirtes It is also falling back to mapping named arguments at runtime if the callee is known, but the arguments are not in order. And in case you are using named arguments at all, PHP emits an extra CHECK_UNDEF_ARGS opcode to execute at runtime (no idea about the overhead it adds).

[PHP Architect @phparch]

🔥 Friend of the magazine @realFlowControl returns to close out our guide to investigation loops with profiling. Learn how to incorporate profiling to understand more about what your code is doing 🔥 https://t.co/XBcEaANjf4

[Florian Engelhardt @realFlowControl]

👶💕 Life just got wilder: a few days ago, we welcomed little Isabell into our family! Now the crew is complete: three girls 👩👩👩 and three boys 👦‍👦‍👦. Life will never be boring! 💛

[Florian Engelhardt @realFlowControl]

Thanks @nicolasgrekas for fixing a use-after-free in parallel. I just released v1.2.12
https://t.co/zLNYlI9ILF

[Florian Engelhardt @realFlowControl]

@alexdaubois It's a hack, it fills the array, but it also allocates all elements in the packed array or hash map in one go, so no reallocations needed 🎉

[Florian Engelhardt @realFlowControl]

@alexdaubois See https://t.co/lsLdeYgi1Z for `array_fill()`

[Florian Engelhardt @realFlowControl]

@alexdaubois Try running with `$size = 2_097_152` and memory overhead for the array is just ~6% (due to the ^2 realloc). If you want to avoid the reallocations, use `array_fill(0, $size, 0);` to "pre-allocate" a packed array, which makes it faster then SplFixedArray

[Florian Engelhardt @realFlowControl]

@alexdaubois I did use those two in a template engine I wrote two decades ago ;-)

[Florian Engelhardt @realFlowControl]

New year*, new parallel release:
v1.2.11 just landed with stability fixes 🎉

https://t.co/9CVNg4X30h

* right on time for the Chinese New Year 🔥🐴

[Florian Engelhardt @realFlowControl]

@tideways Congrats on ten years 🎉

[ConFoo Developer Conference @confooca]

We are proud to count DataDog among our sponsors for ConFoo 2026. https://t.co/OMZPP94V8s

[Florian Engelhardt @realFlowControl]

I’m heading to @confooca 2026 in Montréal 🇨🇦 in a few weeks, where I’ll be speaking about two things I care a lot about in the PHP world: observability and multithreading.
Hit me up if you want to talk performance! 🚀
#ConFoo #PHP #Observability #Performance #Multithreading

[Florian Engelhardt @realFlowControl]

@another_clue 👍

[Florian Engelhardt @realFlowControl]

Your favourite PHP multithreading extension just got tougher. `ext-parallel` v1.2.9 fixes crashes caused by doing things you technically shouldn’t do 😉
Better stability, fewer segfaults.

https://t.co/94GXfOUNj6

[Adam Culp 🧗🎸🥁👨‍💻 @adamculp]

The 2026 State of Open Source Survey is live, and the #Zend team and I want to hear how you're using #PHP and other #OSS technologies.

Your anonymous answers will be used to build two industry reports, available free next year: https://t.co/dYFy8fzZxK

[Florian Engelhardt @realFlowControl]

@kotomin_m Get well soon

[Florian Engelhardt @realFlowControl]

In February, you’ll get the chance to meet an amazing group of people in London 🇬🇧 at the @PHPUKConference 🎉
Grab your ticket at https://t.co/qdVOIPA2MO (if you have not already) and hit me up, if you want to talk about #performance and #observability in #PHP

[PHP UK Conference @PHPUKConference]

🚨 We’re excited to announce Florian Engelhardt as our next speaker!

As Software Engineer at Datadog, Florian builds the tools that give developers deep insights into their applications, including the PHP profiler.

In his talk, “The Four Pillars of Observability.” He'll explore the four pillars of observability - metrics, logging, tracing, and profiling.

🎟️ Early Bird tickets are open now, don't miss out: https://t.co/LwBgdfarjN

#php #phpc #observability #monitoring #devops

[Longhorn PHP @LonghornPHP]

The #longhornphp 2025 tutorial day is underway! @alenaholligan is presenting on BDD, @realFlowControl is walking through building an observability extension with Rust, and @DaveLiddament is diving into building custom Rector rules.

[Florian Engelhardt @realFlowControl]

@dianasoyster @LonghornPHP Yes, I'll be around for the rest of the conference

[Florian Engelhardt @realFlowControl]

Thrilled to bring my workshop Observing PHP for Fun and Profit to @LonghornPHP this year! 🚀
We’ll peek under the hood of the PHP engine and even build our own extension in Rust.
Come hack on internals with me 👉 https://t.co/nR4cAAb1m3

[Longhorn PHP @LonghornPHP]

We are excited to have @realFlowControl presenting a tutorial in addition to his keynote. We'll learn all about Observing PHP for Fun and Profit! Deep dive into the PHP engine internals and build a PHP extension to measure performance!

Join us at https://t.co/lH8lt2dHsa

[Longhorn PHP @LonghornPHP]

Want to attend Longhorn PHP in person, but can't afford a ticket? Thanks to the PHP community, we have a few free tickets to give away to those who need it.

We're just asking for a $20 refundable deposit. Register here:

https://t.co/XvQAESl1Am