Chakra - Building A New JavaScript Engine For Internet Explorer 9
summary
Chakra is a ground-up JavaScript engine inside Internet Explorer 9 that targets ECMAScript 5 support, uses background JIT compilation on spare cores, and applies heuristics so not all code is compiled. The browser adds hardware acceleration (GPU) across markup and canvas. Measured results claim SunSpider parity within about 77 milliseconds of Chrome, and a demo shows ~50 frames per second for a 20‑fish canvas animation versus ~11 fps in Chrome. The platform preview installs side‑by‑side and needs Windows 7/Vista.
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chapters (22)
- 0:00Introduction
- 1:18The Web
- 2:44AllAround Fast
- 3:59Data
- 4:37Size Comparison
- 5:58Speed Comparison
- 7:42Average time spent in JavaScript
- 10:14Compile
- 11:22Heuristics
- 12:29Platform Preview
- 17:28Benchmark Scores
- 18:50Performance Tests
- 19:47New Features
- 21:14Object Type System
- 22:34Moving the JavaScript engine into the browser
- 23:24MS Performance
- 25:02Hardware Acceleration
- 26:05Interoperability
- 27:19API Data
- 28:18ACMA
- 29:02Test Suite
- 30:39Developer Tools
