3 ms·
Compilers are able to do the same since a few years.
by jfkebwjsbx 7y ago
Compilers are able to do the same since a few years.
- projektfu 7y agoYes, but they rarely take a whole-program approach. Reducing a complicated sequence of function calls to a few goto’s is not an easy task. Probably NP-hard?
- BubRoss 7y agoDoing it on a whole program basis is also unlikely to give much benefit. Function calls are extremely fast, they only show their overhead in tight loops.
- projektfu 7y agoYeah, reviewing the repository there’s a lot of high level language code now, so that probably removes most of the benefit of assembly. You’re still calling into the OS a lot. Some of the other low level systems (like the Mac) had a trap system that wasn’t so far away in cycle count from user code. But in these days of needing 10,000 cycles to bridge a system call it’s best to do whatever you can to avoid calling the OS.