Migration of core modules to primordials

[targos]

This is a tracking issue for the migration of core modules to use builtins from the primordials object.

At the moment, for performance-sensitive code, only static methods and global functions should be migrated. V8 8.0 might have the optimization that we need to migrate prototype methods.

[aduh95]

Is there somewhere I can find out about primordials and why/how it is better than using global builtins? Maybe a recording of the meeting when this decision was taken? Is the primordials object documented somewhere?

[amitmtrn]

@aduh95
from my understanding it made in order to avoid user mutation in core libraries

node/lib/internal/per_context/primordials.js

Lines 5 to 7 in 141a6e3

	// This file subclasses and stores the JS builtins that come from the VM
	// so that Node.js's builtin modules do not need to later look these up from
	// the global proxy, which can be mutated by users.