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Clojure Performance on the JVM

Understand what differs from Java: reflection, boxing, persistent collections, and lazy sequence allocation.

Clojure Performance on the JVM focuses performance work on evidence rather than folklore. Java engineers should read these lessons as a disciplined JVM optimization path: measure, isolate the constraint, choose the smallest useful change, and preserve readability unless the metric proves the trade-off.

Use the child pages as practical checkpoints for reviewing hot paths, memory pressure, concurrency decisions, interop boundaries, and production feedback loops.

In this section

  • Understanding the JVM Performance Model
    Explore the intricacies of the JVM performance model, focusing on memory management, JIT compilation, and garbage collection, and their impact on Clojure applications.
  • Using JVM Optimizations from Clojure
    Learn how to write Clojure code that leverages JVM optimizations to enhance performance, focusing on avoiding dynamic code paths and effective use of polymorphism.
  • Comparing Clojure and Java Performance
    Explore the performance characteristics of Clojure compared to Java, focusing on dynamic typing, immutability, and JVM optimizations.
Revised on Saturday, May 23, 2026