JavaScript:SpiderMonkey:Performance

Challenges and upcoming work (rough)

• PIC stuff
• dictionary after delete --> remove middle deletes
• for...in / fasta
• tracing invocations. could face trouble.
• merge traces - 3D cube, emulators, etc.
• mutual recursion
• recursion inside of a loop
• switch tables
• tail recursion - blocked by merge traces
• ComputeThis costs in browser
• branch-to-branch transition costs
• loading values + trackers should be lazy
• sub-type shaping
• JSOP_LAMBDA tracing
• callee guard removal
• strings???