Runtime Performance Optimization

[kateinoigakukun]

• Reduce unnecessary calls of memory and dataView getter in runtime TS code
• Promote result pointer to return value to reduce memory operations
• Reduce Swift ARC retain/release operations by:
  • Reduce Optional wrapper
  • Reduce reference escapes
• Add fast paths for empty arguments call

[github-actions]

Time Change: -3,602ms (19%) 👏

Total Time: 18,757ms

Test name	Duration	Change
Serialization/Call JavaScript function directly	4ms	+1ms	⚠️
Serialization/Assign JavaScript number directly	5ms	+2ms (37%)	🚨
Serialization/Call with JavaScript number directly	5ms	-1ms	👏
Serialization/Write JavaScript string directly	4ms	+2ms (37%)	🚨
Serialization/JavaScript function call from Swift	195ms	-464ms (238%)	🏆
Serialization/Swift Int to JavaScript with call	1,536ms	-1,056ms (68%)	🏆
Serialization/JavaScript Number to Swift Int	468ms	-221ms (47%)	🎉
Serialization/Swift String to JavaScript with call	1,673ms	-1,051ms (62%)	🏆
Object heap/Increment and decrement RC	7,844ms	-512ms (6%)	✅

View Unchanged

Test name	Duration	Change
Serialization/Call with JavaScript string directly	3ms	-0ms
Serialization/JavaScript function call through Wasm import	25ms	+0ms
Serialization/JavaScript function call through Wasm import with int	20ms	+0ms
Serialization/Swift Int to JavaScript with assignment	421ms	-14ms (3%)
Serialization/Swift String to JavaScript with assignment	488ms	-15ms (3%)
Serialization/JavaScript String to Swift String	6,067ms	-272ms (4%)

[MaxDesiatov]

Fantastic work, these are very impressive improvements! 👏

I only have a couple of suggestions for improving doc comments, but otherwise this LGTM.