1997970 - Eliminate redundant unwrapping in JS MicroTaskQueue Paths

Status: NEW

(Core :: JavaScript Engine, task, P3)

Description

[Matthew Gaudet (he/him) [:mgaudet]]

If you look at the path prior to the call to RunAndConsumeJSMicroTask in RunMicroTask you'll see a whole bunch of calls which, passing through MustConsumeMicroTask, end up calling the various *Get helpers on JSMicroTasks.

Looking at the implementations of these, there's a repeated pattern:

• Check if Object
• Unwrap
• do the thing

But this means that we're leaning pretty heavily on the optimizer to remove redundant checks and unwraps. It would be better if we could avoid these by construction.