2. What’s New in ChakraCore
P4103
What’s New in ChakraCore
Brian Terlson
@bterlson
github.com/bterlson

3. Open Source JavaScript Engine

4. Open Source &
Cross Platform
JavaScript Engine

5. Open Source &
Cross Platform &
Standards Compliant
JavaScript Engine

6. Open Source &
Cross Platform &
Standards Compliant &
High Performance
JavaScript Engine

7. Open Source &
Cross Platform &
Standards Compliant &
High Performance &
Embeddable
JavaScript Engine

8. Github.com/Microsoft/ChakraCore
Keep on top of updates
Download releases
File bugs
Send Pull Requests (“my-first-pr” label)

9. JS Next: Full ES2016 & ES2017 Support
Object.values & Object.entries
Array.prototype.includes
[NaN].indexOf(NaN); // => -1 
Object.values({x: 1, y: 2});
[NaN].includes(NaN); // => true 
// => [1, 2] Object.entries({x: 1, y: 2});
Exponentiation Operator
// => [ [‘x’, 1], [‘y’, 2] ]
let y = x ** * x + 5;
String Padding
Async Functions
“$2.00”.padStart(8); // => “ $2.00”
async function add (p1, p2) {
… & more!
return await p1 + await p2 }

10. Performance Wins Function Body Re-deferral
Shared Array Buffers & Atomics
WebAssembly

11. Performance Wins Function Body Re-deferral
Shared Array Buffers & Atomics
WebAssembly

12. Performance Wins Function Body Re-deferral
Shared Array Buffers & Atomics
WebAssembly

13. WebAssembly (WASM) Demo

14. Node-ChakraCore & N-API
N-API: a stable API for native module developers
Collaboration among Node, IBM, NodeSource, NearForm, Intel, and others.
Upgrade Node without recompiling modules
Swap Node for Node-ChakraCore without recompiling

15. Time Travel Debugging

16. JavaScript Runtime APIs (JSRT)
Enable JavaScript scriptability in any application
Simple C APIs – Easy to Start
Resource Throttling – Manage Resources
Script Serialization – Faster Startup & Throughput
Rental Threading – Manage Resources & Performance

17. Thanks for watching!
ChakraCore:
Node-ChakraCore:
JSRT Overview & Documentation:
WebAssembly (WASM) Demo:
Brian Terlson
@bterlson
github.com/bterlson