Javascript:SpiderMonkey:ProjectGenerationGarbageCollection: Difference between revisions

# Exact Rooting done in JS Shell {{bug|753203}} - 12 weeks started

#* Rooting Analysis on TinderBox (sfink) - done

#** Still need to unhide it for inbound - get it green, keep it green

#* Get the root analysis build green - two weeks?

#** Get jit-tests green {{bug|745742}}

#** Get js ref tests green  

#** Get jsapi-tests green {{bug|831376}}

#* Rooting analysis fuzz bugs {{bug|773746}}

#** Rely on static analysis to make this not be a whack-a-mole game

#* Remove E4X - done

#* Do something about JSD

#* Add exact roots to stack structures - 2 weeks

#* AddRoot/RemoveRoot for Heap structures - 4 weeks

#* Static code analysis {{bug|831409}}

#** Fix all discovered rooting hazards (~800) (sfink,jonco) - 4 weeks

#** Optimize all discovered over-rooting (~100)

#** Automate static analysis {{bug|834912}} (sfink)

#*** Need a server (dm-sixgill01?)

#*** http://people.mozilla.org/~sfink/rootingHazards.txt

#*** http://people.mozilla.org/~bhackett/gcFunctions.html

# JIT Integration with post barriers - 4 weeks, parallelized

#* IonMonkey {{bug|831506}} - 1 week (bhackett)

#* JaegerMonkey {{bug|764876}} - 2 days (bhackett)

#* Baseline JIT {{bug|831507}} - <ask jandem/djvj for an estimate>

# Generational Garbage Collection in the Shell

#* Implement prototype algorithm (terrence) - 1 week

#* This is a potential milestone: we would need to build it and test it on TBPL similar to how |r| works now -- |GGCJS|.

#* Re-implement HashTable rekeying

#** We undid this code because it was a perf regression and was still a bit buggy. (terrence) - 3 weeks

#** at least part of this is {{bug|726687}}

# Exactly Root the Browser {{bug|831379}} - 10 weeks

#* This is a potential milestone: we would turn on exact rooting for release FF at this point. We would not get a performance boost from this (necessarily), but it would lock in our work to this point.

# Performance Tuning - 4 weeks (This should probably start asap)

#* Implement a Nursery {{bug|706885}} - 1 week

#* Test against V8 Earley-Boyer benchmark.

#** Also v8 deltablue, raytrace

#* We may need to Implement Bill’s Pools/Zones idea to get the nursery to the requisite perf {{bug|759585}} - 6 weeks

#* Refactor code to avoid rooting on hot paths and keep rooter overhead acceptable - ??? weeks (start early) (bhackett)

# Make the Post Barrier Verifier Green in the browser {{bug|764882}}

#* Investigate how long it will take to do generational barriers - 1 week

#* We may need to rewrite the maps in xpconnect and the browser in terms of HashTable: this could be a bunch of work.  

#* Make JS_IsAboutToBeFinalized indirect {{bug|765432}} - 10 weeks