The course is well-structured and engaging, genuinely challenging. Plenty of hands-on practice.

Great course — really glad Ivan created it and that I had the chance to join. I especially appreciated having access to lecture recordings to revisit at any time. The abundance of additional videos, links, and Ivan's notes broadened my perspective significantly and gave me a clear direction for what to watch and read next.

A very strong and fundamental course that covers core Computer Science principles regardless of programming language. Throughout the program, we explored computer architecture, cache and memory optimizations, assembly language internals, and how the operating system manages processes, threads, address space, and resources — building a deep understanding of performance at the low level.

Ivan's lectures were the most valuable for me. There are many areas in computer science that you don't really think about when you're just writing code. Ivan shows exactly those aspects — how they work and why it's important to understand them if you want to optimize anything.
I was constantly asking questions, actively engaging, and that was really valuable. When someone has already been through that journey and explains complex things in a simpler way, it saves a lot of time on research and helps you build intuition faster. That, in my opinion, is one of the strongest sides of the course.

This program covered advanced techniques in performance analysis and system optimization.

Based on the quality of the content and the expertise of the instructor, Ivan Petrushenko, I highly recommend this course to any professional seeking to master the nuances of performance engineering.

I especially liked the teaching approach, where I was encouraged to find the answer myself in small steps. Thanks to these courses, I discovered for myself how to continue learning at the Senior level. And live communication during lectures turned out to be much more effective than watching recorded videos on Udemy, Coursera, or YouTube.

This course offers an in-depth exploration of the low-level mechanics behind modern operating systems and CPU architectures, covering topics like caching, memory management, instruction-level performance, processes, multithreading, and concurrency.
I highly recommend it to developers who want to move beyond abstractions and learn to write optimized code grounded in a strong understanding of system internals.

The course gave a deep understanding of the topic. It was interesting and informative. It is very gratifying that such initiatives are developing in Ukraine. I sincerely recommend it!

A must-have for anyone who wants to delve into the ins and outs of a modern computer: how its CPU works, what memory is made of, and how the operating system manages processes. This knowledge will allow you to stand out both in technical interviews and during code reviews, providing useful advice. The course is well-structured and includes non-trivial homework assignments. The analysis of optimization cases in the Facebook and Twitter code bases is a particular pleasure.

The depth and quality of the materials are unmatched by any other course. It is a truly unique experience that provides a deeper and more practical understanding of how computers work.

It was an interesting 3 months, during which I managed to gain and improve my knowledge of code optimization, virtual memory, and process interaction with the operating system. I would also like to note the thoughtful homework assignments — it was a great opportunity to practice what I learned.

I highly recommend this course and the platform in general!

The course is very well structured: it starts with high-level abstractions and gradually delves into details. Examples are based on real projects; interesting and practical homework assignments (I even had to defuse a bomb!). Worth every minute and every hryvnia invested.

I really enjoyed learning about fundamental topics like algorithm optimization and caching. The chapters on improving CPU and memory efficiency were especially valuable. The material was presented in a clear and accessible way, and the knowledge I gained was immediately applicable.

The course is just great! It's a really cool way to gain new knowledge, meet interesting people, and as a bonus, prepare for technical interviews. One of my best investments, I can recommend it to everyone!

It was one of the most impressive learning experiences of my life. The teacher was able to convey deep knowledge of the subject and made the process exciting. During the study, you will challenge yourself and, equally important, meet interesting people.

While preparing for the interview at FAANG, I took the Algorithms in Practice course, and later Performance Engineering. Now I can confidently say that both courses helped me get offers from Oracle and Microsoft.

It will be interesting and difficult, highly recommended to everyone! The course helped me to quickly understand complex code on a new project, understand the data structures and optimizations used. These are things every programmer should know.

While taking the course, I received great satisfaction from the structured approach. The curator impresses with his ability to present information in an accessible and detailed manner. The knowledge gained from the course also has practical application in my work, which emphasizes the value of the education received.