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JavaScript Performance

V8 Engine Internals: Hidden Classes & JIT

6 weeks
0 Learners
eulerfoldeulerfold
Jul 23

“Understand why some JavaScript patterns are 10x slower than others by exploring V8 hidden classes, inline caches, and JIT compilation.”

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About this Course

Understand why some JavaScript patterns are 10x slower than others by exploring V8 hidden classes, inline caches, and JIT compilation. This JavaScript Performance curriculum is designed to give you hands-on experience and deep conceptual understanding. Across 6 intensive modules, you'll tackle real-world challenges and build practical projects that reinforce your learning. By the end of this journey, you'll have the skills and proof of work to demonstrate your expertise.

What you'll learn

Master the core concepts of v8 architecture & execution pipeline.
Gain hands-on experience with hidden classes (shapes) & transition trees.
Understand the architecture behind inline caches (ic) & monomorphism.
Implement production-grade turbofan jit optimizations & deoptimizations.

Prerequisites

advanced Level

This is a rigorous course requiring prior technical background.

  • Operating System fundamentals
  • C/Rust systems programming

Ideal for

Performance-Focused JS Developers

JavaScript Performance Professionals
Tech Enthusiasts
W1

V8 Architecture & Execution Pipeline

Master the core concepts of v8 architecture & execution pipeline.

4 videos•99m
3 readings
4 topics
1 homework
Learn

Topics

1.1
Parse Tree to AST
28 minutes
1.2
Ignition Interpreter & Bytecode
36 minutes
1.3
TurboFan JIT Compiler Workflow
27 minutes
1.4
Memory Heap Structure & Pointer Tagging
8 minutes

Study Resources

→The Modern JavaScript Tutorial→(PDF) performance comparison of C++ and javascript...→Performance Tuning - Docling Graph Documentation
W2

Hidden Classes (Shapes) & Transition Trees

Gain hands-on experience with hidden classes (shapes) & transition trees.

4 videos•48m
3 readings
4 topics
1 homework
Learn
W3

Inline Caches (IC) & Monomorphism

Understand the architecture behind inline caches (ic) & monomorphism.

4 videos•42m
3 readings
4 topics
1 homework
Learn
W4

TurboFan JIT Optimizations & Deoptimizations

Implement production-grade turbofan jit optimizations & deoptimizations.

4 videos•60m
3 readings
4 topics
1 homework
Learn
W5

Ignition Interpreter & Bytecode

Analyze V8's Ignition interpreter, how it generates bytecode, and register allocation.

3 videos•70m
3 readings
3 topics
1 homework
Learn
W6

Turbofan & Sea of Nodes

Dive into Turbofan, V8's optimizing compiler, and the Sea of Nodes graph representation.

3 videos•45m
3 readings
3 topics
1 homework
Learn
01

Learn

Watch curated videos and read study resources

02

Practice

Practice what you learned

03

Build Projects

Build projects using your new gained knowledge

04

Submit & Verify

Submit your project and get verified by our system

References

01The Modern JavaScript Tutorial
02(PDF) performance comparison of C++ and javascript...
03Performance Tuning - Docling Graph Documentation
04Hidden Classes in JavaScript: Benchmarking Performance Behind...
05JavaScript Tutorial
06Monomorphism Is the Secret to Speed - Loke.dev
07What's up with monomorphism? | daily.dev
08V8 engine and Inline Caching in JavaScript | by ANUPAM...
09V8 Engine Architecture: Deterministic JS Execution & JIT Optimization
10How JavaScript works: Optimizing the V8 compiler... - DEV Community
11A Mere Mortal's Introduction to JIT Vulnerabilities in JavaScript Engines
12Unlocking the V8 Engine: Why Your JavaScript is... - DEV Community
13Ignition Interpreter and JS Bytecode Tutorial | 2026 | RuneHub
14Ignition Interpreter and Bytecodes | plctlab/v8-internals | DeepWiki
15JavaScript Core and V8 A Deep Dive into Engine... | Leapcell
16JavaScript Compilation Pipeline | v8/v8 | DeepWiki

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