---
title: "JVM Workhorses - Stubs and Intrinsics"
url: https://daily.dev/posts/jvm-workhorses---stubs-and-intrinsics-aavy8p5q4
source_url: https://softwaremill.com/jvm-workhorses-stubs-and-intrinsics/
type: article
source: "SoftwareMill"
published: 2026-03-17T13:57:33.351Z
updated: 2026-03-17T13:58:02.707Z
tags: ["performance", "java", "jvm"]
reading_time: 11
upvotes: 0
comments: 0
language: en
---

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# JVM Workhorses - Stubs and Intrinsics

**[SoftwareMill](https://daily.dev/sources/softwaremill)** · 11 min read · 0 upvotes · 0 comments

## Summary

A deep dive into JVM stubs and intrinsics, explaining how they are generated at startup, how they enable high-performance execution of critical operations like Math.pow and System.arraycopy, and how to inspect or disable them. The post covers the four stub generation phases (initial, continuation, compiler, final), demonstrates how to print generated stubs and intrinsics using JVM flags, and benchmarks four configurations: intrinsics fully on, disabled via InlineNatives, disabled via ControlIntrinsic, and disabled via UseLibmIntrinsic. Profiler results reveal why the intrinsified path is ~4-18x faster, tracing the fallback chain through FdLibm, JNI overhead, and SharedRuntime::dpow.

## Full article

daily.dev links to this article rather than hosting it. Read it at the original source: <https://softwaremill.com/jvm-workhorses-stubs-and-intrinsics/>

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---

Tags: [#performance](https://daily.dev/tags/performance), [#java](https://daily.dev/tags/java), [#jvm](https://daily.dev/tags/jvm)

[View this post on daily.dev](https://daily.dev/posts/jvm-workhorses---stubs-and-intrinsics-aavy8p5q4)