JavaScript:SpiderMonkey:GC Futures: Difference between revisions

Revision as of 18:19, 16 July 2009

Brain-dump of work items:

Speed up allocator
Speed up collector
Remove byte flag per thing design
- Bad cache effects of flags and things allocated from opposite ends of same arena
- Don't want generality of different thing-types allocated from same size class
  - Can put finalizer or other index/info in the pool, not in each flag's low bits
  - Compress flags to mark bit in bitmap?
Add new JNI-like (handles, "clothed" not "naked") global rooting API
Make old JS global rooting API be #ifdef JS_NAKED_GC_ROOTS (enabled at first)
Convert mozilla-central to use new global rooting API
Disable JS_NAKED_GC_ROOTS
Write barrier for all code including JITted code
Write barrier in API
Fast generational copying allocation and collection

@@ Line 6: / Line 6: @@
 * Speed up collector
 * Remove byte flag per thing design
-  * Bad cache effects of flags and things allocated from opposite ends of same arena
+** Bad cache effects of flags and things allocated from opposite ends of same arena
-  * Don't want generality of different thing-types allocated from same size class
+** Don't want generality of different thing-types allocated from same size class
-    * Can put finalizer or other index/info in the pool, not in each flag's low bits
+*** Can put finalizer or other index/info in the pool, not in each flag's low bits
-    * Compress flags to mark bit in bitmap?
+*** Compress flags to mark bit in bitmap?
 * Add new JNI-like (handles, "clothed" not "naked") global rooting API
 * Make old JS global rooting API be #ifdef JS_NAKED_GC_ROOTS (enabled at first)