4 ms·

Is the size of the erlang vm one such point? I think I remember reading it's about 500mb, and you won't find it installed by default in many systems.

square_usual 3y ago
Startup time is another. For example: $ elixir test.exs hello, world! $ hyperfine "elixir test.exs" Benchmark 1: elixir test.exs Time (mean ± σ): 471.1 ms ± 2.6 ms [User: 187.4 ms, System: 83.1 ms] Range (min … max): 467.1 ms … 475.6 ms 10 runs Compared to: $ ruby test.rb hello, world! $ hyperfine "ruby test.rb" Benchmark 1: ruby test.rb Time (mean ± σ): 36.3 ms ± 2.6 ms [User: 26.0 ms, System: 8.4 ms] Range (min … max): 34.5 ms … 53.6 ms 53 runs In practice, I've been able to get the ruby startup time to as low as 6ms - this is what I use for scripts running as keyboard macros, for example. I cannot practically use elixir for that.
- hosh 3y ago
  Huh, interesting. I bet for keyboard macros, it would work better by invoking a call to something that is already running to reduce startup time. Kinda like the emacs server. BEAM should still be able to compile new code on the fly, for one-off scripts
  - square_usual 3y ago
    > keyboard macros [...] would work better by invoking a call to something that is already running to reduce startup time Maybe, but that comes with two disadvantages: - I would have to re-architect my scripts to work like that, and run a server with uncertain memory costs perpetually; and - I would have to use something with faster start time to run the call on my keyboard macros, e.g. bash, which would mean writing bash instead of elixir/ruby and/or being clever.
- barkerja 3y ago
  Using escript, I am able to almost halve the startup time. But it's still ~4x slower than ruby. hyperfine "./derp" Benchmark 1: ./derp Time (mean ± σ): 241.0 ms ± 7.4 ms [User: 146.9 ms, System: 170.8 ms] Range (min … max): 235.1 ms … 261.7 ms 11 runs
bongobingo1 3y ago
Most of my phoenix apps sit under or around 100mb resident, and they load a fair bout more than a script probably would.
nelsonic 3y ago
Not even close. A Nerves (iOT) package with Linux Kernel and Erlang/OTP VM and our App code comes in at 21Mb. See: https://nerves-project.org/ https://nerves-project.org/

square_usual 3y ago

Startup time is another. For example: $ elixir test.exs hello, world! $ hyperfine "elixir test.exs" Benchmark 1: elixir test.exs Time (mean ± σ): 471.1 ms ± 2.6 ms [User: 187.4 ms, System: 83.1 ms] Range (min … max): 467.1 ms … 475.6 ms 10 runs Compared to: $ ruby test.rb hello, world! $ hyperfine "ruby test.rb" Benchmark 1: ruby test.rb Time (mean ± σ): 36.3 ms ± 2.6 ms [User: 26.0 ms, System: 8.4 ms] Range (min … max): 34.5 ms … 53.6 ms 53 runs In practice, I've been able to get the ruby startup time to as low as 6ms - this is what I use for scripts running as keyboard macros, for example. I cannot practically use elixir for that.

hosh 3y ago
Huh, interesting. I bet for keyboard macros, it would work better by invoking a call to something that is already running to reduce startup time. Kinda like the emacs server. BEAM should still be able to compile new code on the fly, for one-off scripts
- square_usual 3y ago
  > keyboard macros [...] would work better by invoking a call to something that is already running to reduce startup time Maybe, but that comes with two disadvantages: - I would have to re-architect my scripts to work like that, and run a server with uncertain memory costs perpetually; and - I would have to use something with faster start time to run the call on my keyboard macros, e.g. bash, which would mean writing bash instead of elixir/ruby and/or being clever.
barkerja 3y ago
Using escript, I am able to almost halve the startup time. But it's still ~4x slower than ruby. hyperfine "./derp" Benchmark 1: ./derp Time (mean ± σ): 241.0 ms ± 7.4 ms [User: 146.9 ms, System: 170.8 ms] Range (min … max): 235.1 ms … 261.7 ms 11 runs

bongobingo1 3y ago

Most of my phoenix apps sit under or around 100mb resident, and they load a fair bout more than a script probably would.

nelsonic 3y ago

Not even close. A Nerves (iOT) package with Linux Kernel and Erlang/OTP VM and our App code comes in at 21Mb. See: https://nerves-project.org/ https://nerves-project.org/