Is there any way to find chrome is running ignition or crankshaft V8 Engine?
As per https://v8project.blogspot.in/2017/05/launching-ignition-and-turbofan.html, chrome uses V8 ignition engine by default from version 59. I am looking for a way to enable ignition in chrome version#57 (in CEF environment).
When i use --js-flags="--ignition --turbo" in chrome 57, i am not finding much difference in js execution speed through chrome's performance inspect tools. So, i am looking for a way to query running v8 engine so that i will be sure enough to carry out my test on crankshaft or ignition; also, please do share any guidelines for performing JS load and execution performance.
Thanks!!!
Using Ignition in Chrome M57 is not officially supported. You can play with it if you like; it may or may not work; you're on your own.
Ignition does not replace Crankshaft. It replaces "full codegen", the old non-optimizing compiler. Ignition is not faster than full-codegen, but it saves memory (and has other, mostly internal/architectural, benefits).
There is no way to find out from JavaScript which compiler is being used. From the command line, you can use --js-flags="--trace-opt" to trace which functions are getting optimized by which compiler.