Use TypedArray.set to copy a bunch of bytes

[kateinoigakukun]

No description provided.

[github-actions]

Time Change: -187ms (2%)

Total Time: 7,819ms

ℹ️ View Unchanged

Test name	Duration	Change
Serialization/Write JavaScript number directly	170.5ms	+3.25ms (1%)
Serialization/Write JavaScript string directly	174.25ms	+0.5ms
Serialization/Swift Int to JavaScript	2,383ms	-85.5ms (3%)
Serialization/Swift String to JavaScript	2,478.75ms	-89ms (3%)
Object heap/Increment and decrement RC	2,612.5ms	-16.25ms (0%)

_{performance-action}

[j-f1]

Nice!