Café in Valencia center
Open discussion & networking
QA Breakfast Valencia
Coffee, breakfast and honest conversations about software engineering.
An English-speaking high-tech community for engineers, product managers, founders, SREs, developers and anyone building software in Valencia.
- Valencia
- Morning meetups
- English
- Free with registration
Next event
September 23, 2026 · 9:30 AM
Is Your App Really Faster? Compiler Performance Testing
A performance number can look perfectly convincing and still tell you almost nothing.
At this QA Breakfast, we will explore how compiler performance is tested, why benchmark results can be misleading, and how thousands of noisy measurements can be transformed into a small number of issues actually worth investigating.
Speaker
Lidiya Kryukova
JVM Compiler Performance Engineer
Lidiya works on JVM compiler performance and builds automation that helps humans avoid staring at thousands of benchmark results all day. If you have ever wondered what really happens under the hood when a compiler processes the code you write — or generate with AI — Lidiya is exactly the right person to ask.
We'll learn
- How compiler performance can affect the applications we build
- Why seemingly convincing performance numbers may tell us very little
- How surprisingly simple mistakes can make benchmark results misleading
- How to distinguish meaningful performance changes from measurement noise
- How automation helps identify the results that genuinely require human investigation
What you'll gain
A better understanding of what happens behind your code and a practical view of how reliable compiler performance testing works at scale.
Also in the agenda
- Hot meal to start off your morning
- Talk: Is Your App Really Faster? Compiler Performance Testing
- Open discussion on the presented topic and other topics
- Friendly networking
About
What is QA Breakfast?
QA Breakfast Valencia is a high-tech community that meets in the morning to learn from each other, discuss real engineering challenges and make new professional connections.
- Morning meetupsCoffee, food and self presentation
- Learn from each otherA practical topic and open discussion
- Meet beyond workShare experience with people outside your usual team
Who is for it
- Software engineers
- Product managers
- QAs
- Developers
- Architects
- SREs
- Performance engineers
- Startup founders
- Tech enthusiasts
What makes it different
Practical topics
Real engineering cases instead of sales presentations.
Open discussion
Participants are encouraged to ask questions and share experience.
Small community
A friendly format where people can actually meet each other.
English-speaking
Open to Valencia’s international high-tech community.
Organiser
I have worked in software engineering on enterprise products for more than 15 years. For the past six years, I have led a Performance Engineering team responsible for the backend of a collaboration platform with over two million daily active users.
I am also an international conference speaker, educator and mentor in QA and Performance Engineering, organizer of local tech meetups, and Performance Engineering consultant.
I started QA Breakfast because I wanted a community of like-minded people in Valencia’s high-tech scene — a place to learn from practical talks and open discussion, widen my network beyond my usual team, and connect different tech communities in English. What began with a handful of us grew into a steady group with talks on SRE, DevOps, security, AI, QA, Development and more. My hope is to keep building it together: a proactive community where members bring their own topics and speakers.
How it works
A simple morning format
One relaxed morning, twice a month — café or office, same friendly rhythm.
- 9:30 AMWednesday mornings
- ~1.5 hoursBreakfast, talk & chat
- 2× a monthCafé + office
RingCentral office
Talks with warm breakfast
Your morning
- Breakfast
Grab breakfast and meet the group
- Introduce
Give a mini self-presentation
- Talk
Listen to a short practical talk
- Discuss
Join the open discussion
- Network
Stay for networking
Archive
Past events
Recent breakfast topics from the Valencia community — practical talks, workshops and open discussions.
September 9, 2026
Season 3 Kickoff: Summer Recap
Group discussion
Season 3 kicked off with an informal Summer Recap — catch-ups, conversation cards, summer stories from work and life, and open AI discussions over breakfast at FIVEO Bar.
June 17, 2026
Cheap to Build, Expensive to Get Right
Ilia Reutov · Product Manager
A passionate discussion about how AI makes software cheap and fast to build, and what it really costs to get it right in production.
View presentation
June 3, 2026
Open Discussion at FIVEO BAR
Group discussion
An active open-format breakfast where everyone shared something special about themselves and learned more about each other.
May 20, 2026
From Good Code to Production Reality
Kirill Yurkov · Customer Reliability Technician Lead, VictoriaMetrics
A practical session on performance engineering and what happens when well-designed application code meets real production systems.
View presentation
May 6, 2026
AI Analysis in Performance Testing
Arseny Startsev · Senior Performance Engineer, RingCentral
How AI analysis was integrated into a performance testing pipeline and helped reduce testing effort by 2x.
April 22, 2026
Between Code and Reality: Why Systems Behave the Way They Do
Kirill Kazarin · Senior SRE Manager, RingCentral
A look at the hidden layer between application code and system behaviour, including how the Linux kernel shapes what we see in production.
View presentationSpeakers
Have a story to share?
QA Breakfast welcomes practical talks, workshops, case studies and open discussions on engineering, product, security, AI, DevOps and more — from anyone in Valencia's tech community.
You do not need to be a professional conference speaker. A useful real-world experience and a willingness to discuss it with the community are enough.