Andrew McCreight 3e76dfaaf2 Bug 1186409 - Use a single global for all JSMs. r=kmag ...

This patch adds a preference jsloader.shareGlobal that makes it so
that JSMs share a single global, in order to reduce memory usage. The
pref is disabled by default, and will be enabled in a later bug. Each
JSM gets its own NonSyntacticVariablesObject (NSVO), which is used for
top level variable bindings and as the value of |this| within the JSM.

For the module loader, the main change is setting up the shared
global, and the NSVO for each JSM. A number of files are blacklisted
from the shared global, because they do things to the global that
would interfer with other JSMs. This is detailed in
mozJSComponentLoader::ReuseGlobal().

MozReview-Commit-ID: 3qVAc1c5aMI

2017-07-18 14:47:27 -07:00

2.1 KiB

Raw Blame History

View Raw