Make Your Java Code Run Faster (Sync vs Async)
In a high-load environment, every single millisecond counts. In this video, we explore the massive performance difference between Synchronous and Asynchronous execution in Java.
I will show you a practical example of a facade fetching data from multiple repositories, explain why sequential blocking code is a bottleneck, and demonstrate how to rewrite it using CompletableFuture and Java 21 Virtual Threads to make your response times 3x faster.
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⏱️ Timestamps:
0:00 - The Problem with Sequential Blocking Code
0:22 - The Synchronous Approach (The Slow Way)
1:04 - Running the Sync Test (3000ms bottleneck)
1:24 - The Asynchronous Approach (Virtual Threads & CompletableFuture)
2:06 - Running the Async Test (1000ms - 3x Faster!)
2:54 - Scaling the Load: 5 Accounts Test (15s vs 5s)
3:16 - The Rule of Thumb: When to use Sync vs Async
#java #async #softwareengineering #backend #virtualthreads #completablefuture #programming #microservices
En esta página del sitio puede ver el video en línea Make Your Java Code Run Faster (Sync vs Async) de Duración hora minuto segunda en buena calidad , que subió el usuario Borys Nikolenko 07 julio 2026, comparta el enlace con amigos y conocidos, en youtube este video ya ha sido visto 23 veces y le gustó 4 a los espectadores. Disfruta viendo!
