function inlining การใช้

Standard declarations to optimize compilation ( such as function inlining or type specialization ) are proposed in the language specification.
In principle compilers aren't required to implement that optimization, but in principle they aren't required to support function inlining either.
On the other hand, AOT usually cannot perform some optimizations possible in JIT, like runtime profile-guided optimizations, pseudo-constant propagation or indirect / virtual function inlining.
The GNU GCC compiler has function inlining, which is turned on by default at-O3, and can be turned on manually via passing the switch (-finline-functions ) at compile time.
This architecture enables well-known optimizations from other programming languages to be used for JavaScript, including type specialization, function inlining, linear-scan register allocation, dead code elimination, and loop-invariant code motion.