Depends on what you mean by “full potential”. BEAM do not support JIT on ARM64, so better performance of the CPU can be eaten by interpreting BEAM code instead of JITing.
hauleth
wojtekmach
Hex Core Team
hauleth
cjbottaro
When??
I just got my M1 MBP today and was slightly disappointed at the Elixir compile times (which is the main language I work with).
On the other hand… holy crap, a small Rust project went from 45s to 10s… 
To get that kind of decrease in Elixir compile times… would be like heaven!
0
dom
OTP 25 is still 6+ months out, but you can use the JIT right now if you build it with kerl. Runs great!
2
cjbottaro
Hello! I tried installing Erlang/OTP with kerl and Elixir with kiex and didn’t notice any difference. How can I tell it’s working? I just installed 24.1.4 though… should I be giving kerl a Github url and branch?
Thanks for the help!
0
dom
Yes, the instruction I linked is for using a branch. Use master from the official OTP repo.
1
cjbottaro
Heh, well using master works, I can see the [jit] tag when starting up repl. Unfortunately, one of my projects compiled fine, but another crashes during compilation. So back to 24.1.4 for now.
0
benwilson512
Author of Craft GraphQL APIs in Elixir with Absinthe
Yeah I’m seeing similarly disappointing times on my new M1 (max) mac pro. For whatever reason I only really see the two efficiency cores doing work while compiling, there is next to 0 activity on the performance cores, and I can’t really figure out why. iex shows [smp:10:10] [ds:10:10:10] so it should have enough schedulers.
I mean, I’m getting roughly the same compile time as my previous MBP (intel) w/ 8 Intel cores so it’s still impressive, but I’d really like to get the 8 performance M1 cores in the mix.
0
