JIT is coming to Erlang. Will that then also benefit Elixir apps?
If I understand correctly, JIT allows to improve performance of the application; i.e. execution time?
How do we use JIT in Elixir?
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I think you don’t do anything (maybe turn on a vm flag) and it just does its thing. Sit back and enjoy a performance gain. The blog article says Jason gets a big speed bump.
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With CLDR release 39 out next month I am on my usual bi-annual compatibility and maintenance cycle for the ex_cldr libraries and decided to see if some critical code will benefit from the JIT compiler in OTP 24.
This simple example is formatting a number which is a complex operation given the flexibility of the formatting system. Overall the performance is about twice as fast for this function which is a big win.
With the JIT (OTP 24.0-rc0)
Name ips average deviation median 99th %
:erlang.float_to_binary 7663.86 K 0.130 μs ±2026.91% 0 μs 1 μs
Float to_string 976.30 K 1.02 μs ±7209.48% 1 μs 2 μs
Number to_string preformatted options 183.40 K 5.45 μs ±416.76% 4 μs 15 μs
Number to_string 56.33 K 17.75 μs ±348.13% 15 μs 65 μs
Without the JIT (OTP 23.2.2)
Name ips average deviation median 99th %
:erlang.float_to_binary 6213.10 K 0.161 μs ±1823.26% 0 μs 1 μs
Float to_string 533.39 K 1.87 μs ±2067.68% 2 μs 2 μs
Number to_string preformatted options 89.48 K 11.18 μs ±166.50% 10 μs 22 μs
Number to_string 23.98 K 41.70 μs ±64.88% 40 μs 69 μs
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