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How We Reduced API Latency by 40% Using Spring Boot Virtual Threads | Associative

How We Reduced API Latency by 40% Using Spring Boot Virtual Threads | Associative

How We Reduced API Latency by 40% Using Spring Boot Virtual Threads

Welcome to Associative, a premier software development firm headquartered in Pune, Maharashtra. Since our establishment in 2021, our team of dedicated innovators has been passionate about transforming visionary ideas into scalable digital realities.

In modern cloud gaming platforms, complex web applications, and enterprise solutions, backend scalability is critical. Recently, our backend engineering team tackled a significant performance bottleneck for a high-traffic application. Below is an inside look at how we reduced API latency by 40% using Spring Boot virtual threads.

The Challenge: I/O Blocking and Thread Pool Limits

Our backend expertise spans scalable server-side logic using Node.js, Python, PHP, Ruby on Rails, and Java (Spring Boot, Jakarta EE). For this specific project, the client's Java-based microservices architecture was struggling under heavy concurrent load.

The traditional thread-per-request model in Java assigns a dedicated OS thread to every incoming HTTP request. When the application made external network calls or complex database queries (SQL/NoSQL), the thread remained blocked, waiting for the I/O operation to complete. Under peak loads, the server quickly exhausted its thread pool, leading to increased response times and CPU context-switching overhead.

The Solution: Migrating to Project Loom and Spring Boot 3.2+

To eliminate these inefficiencies without rewriting the entire codebase into a complex reactive programming model, we leveraged Java Virtual Threads (introduced via Project Loom) alongside the latest Spring Boot updates.

Unlike heavy OS threads, virtual threads are lightweight and managed by the Java Virtual Machine (JVM). Millions of virtual threads can be created without exhausting system memory.

Implementation Steps:

  1. Environment Upgrade: We upgraded the application environment to Java 21 and Spring Boot 3.2, ensuring full compatibility with the new threading model.
  2. Tomcat Configuration: We configured the embedded Apache Tomcat server to utilize a virtual thread executor rather than the standard platform thread pool.
  3. Database Tuning: We optimized our connections to PostgreSQL and Redis, ensuring the connection pool sizes aligned with the new high-concurrency capabilities.
  4. Testing & Simulation: Utilizing our extensive R&D capabilities, we ran intense load testing to simulate high-frequency concurrent traffic.

The Result: Massive Performance Gains

The impact of this architectural shift was immediate and measurable. By unblocking OS threads during database operations and API calls, the system could handle significantly more concurrent requests with the same hardware resources.

This is exactly how we reduced API latency by 40% using Spring Boot virtual threads. Furthermore, server memory consumption dropped, and the application maintained stable response times even during unexpected traffic spikes.

Partner with Associative for Technical Excellence

At Associative, we pride ourselves on holding official accreditations that validate our technical expertise, including being an Adobe Silver Solution Partner and an Official Reseller Partner of Strapi. We offer a one-stop-shop for businesses seeking to innovate across a vast spectrum of domains:

  • Cloud & CMS Solutions: High-performance portals and Headless CMS mastery.
  • Mobile App Development: Native (iOS/Android) and Cross-Platform (Flutter/React Native).
  • AI & Machine Learning: Core AI, Generative AI (LLMs), and Computer Vision.
  • Blockchain & Web3: Smart contracts, DeFi, and ecosystems like Ethereum and Solana.
  • Game Development & AR/VR: Unreal Engine 5, Unity, Apple Vision Pro, and Meta Quest.
  • Specialized Enterprise Solutions: High-frequency trading platforms, custom CRM/ERP, and IoT.

Operational Transparency & Confidentiality

We operate with unyielding transparency and regulatory compliance (registered with ROF, Pune).

  • 100% Ownership: You receive full ownership of the source code and IP upon project completion.
  • Strict NDAs: We maintain strict non-disclosure agreements and do not share your projects in public portfolios.
  • Transparent Billing: We operate purely on a time-and-materials basis. Invoices are submitted transparently, ensuring you only pay for the work performed by our in-house developers.

Contact Us

Ready to optimize your application's architecture or build something new?

Associative

How We Reduced API Latency by 40% Using Spring Boot Virtual Threads Associative - India
Discover how Associative’s expert backend development team optimized high-concurrency applications and reduced API latency by 40% using Spring Boot virtual threads.
Associative - India
Case Study: How We Reduced API Latency by 40% Using Spring Boot Virtual Threads Associative
Discover how the backend engineering team at Associative optimized high-concurrency applications and learn exactly how we reduced API latency by 40% using Spring Boot virtual threads.
AssociativeMayuresh Patil

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