perf(codegen): interp 0.780 -> 0.675 s, iso_miss 1.061 -> 0.967 s — let a declared array type reach the guarded element read and the inline .length

perf(codegen): interp 0.780 -> 0.675 s, iso_miss 1.061 -> 0.967 s — let a declared array type reach the guarded element read and the inline .length #98