Compiled Compiler Templates for V8 or: How I Learned to Stop Worrying and Love JavaScript
نویسندگان
چکیده
The performance of JavaScript virtual machines (VM) improved by several orders of magnitude in the last years, giving raise to ever more complex applications. Consequently there is a high demand for further compiler optimizations and therefore short VM development cycles. V8 the JavaScript engine of the Chrome web browser has a baseline compiler optimized for low compiler latency and an optimizing compiler called Crankshaft to compile hot functions. To achieve better maintainability and to improve robustness we aim at sharing compiler infrastructure and code generating back end between the two compilers. Our approach instruments Crankshaft to generate native code templates for the baseline compiler. We show that our method is practical, reduces complexity and maintains performance. As a case study to support our claims we ported the assembly level implementation of binary operations for baseline code to a version compiled by Crankshaft.
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