Re:Elixir and Phoenix after two years
by toast0 on Monday April 05, 2021 @04:42PM
(#26704430)
I've seen several reports of pretty good performance improvements from the new JIT, but keep in mind a couple things:
It's included in the not yet finalized release that is currently only a release candidate. It's a little early to expect people to have experience with it. Some organizations might update quickly, but others will take quite some time. Also, the JIT isn't on all supported platforms; i think it's amd64 and aarch64 only at the moment, which probably covers most performance oriented servers, but maybe not everyone.
The other thing is it's not an optimizing JIT like Hotspot or v8; it 'only' turns the beam opcodes into native code as it's loaded. This eliminates interpretation overhead, but there's potential to optimize the native code in the future.
It's included in the not yet finalized release that is currently only a release candidate. It's a little early to expect people to have experience with it. Some organizations might update quickly, but others will take quite some time. Also, the JIT isn't on all supported platforms; i think it's amd64 and aarch64 only at the moment, which probably covers most performance oriented servers, but maybe not everyone.
The other thing is it's not an optimizing JIT like Hotspot or v8; it 'only' turns the beam opcodes into native code as it's loaded. This eliminates interpretation overhead, but there's potential to optimize the native code in the future.