JavaScript:SpiderMonkey:PathToFirefox4

Shipping This Year's JS Work

We have 6 weeks to land all major remaining work for Firefox 4. This means we must have everything on this page completed by September 1. There is no wiggle room in this part of the schedule.

JaegerMonkey

The goal for JaegerMonkey is to land all major optimizations and have reasonable conformance (minor regressions ok) to put in a beta.

Task	Size (wks)	Candidate Assignee
more x86 optimizations	6	all
JM Browser: Green Tinderbox	6	dmandelin
Tracer Integration	2	dvander
X64 JIT Backend	2	(sstangl / ??)
JSStackFrame Evisceration	???	lwagner et al.

Debugger

jdbg2 work will be postponed until september 1, since we will not have compelling client consumers ready for Firefox 4. In the meantime, we'll make sure Firebug works better than it does at the moment, thanks to JM integration.

Task	Size (wks)	Candidate Assignee
hook up JM to original JSDBGAPI	2	adrake
make sure Firebug actually works	1	jimb / adrake / honza
spec draft JSON protocol so that work can start on jsdbg2 consumers	.5	jimb

ES5

Firefox 4 will purport to conform to all of ES5, including strict mode. All known bugs will be fixed.

Task	Size (wks)	Candidate Assignee
Fix remaining strict mode bugs	??	Jim Blandy
Object.preventExtensions, Object.seal, Object.freeze	1 (gated on scope removal)	Jeff Walden
Function.prototype.bind	1	Jeff Walden
...	...	Jeff Walden

Compartments

Task	Size (wks)	Candidate Assignee
Compartmentalize Gecko	1	mrbkap
Shake out bugs in compartments, re-enable compartment assertions	3 (with large variance)	mrbkap/jorendorff/gal
Compartmental GC	-	gwagner

VM fixes

Task	Size (wks)	Candidate Assignee
JSScope removal	2	Brendan
JSObject reorganization	1	Brendan / Luke Wagner
lock removal	2	Brendan / Andreas