Hello world is slow ...

[jacksilver045]

Why does the following simple script :

#  cat test.jl 
println("Hello World")

take so much time to execute ?

# time julia test.jl
Hello World

real    0m2.582s
user    0m2.537s
sys     0m0.040s

I am using a fresh install from git (cloned today) on ArchLinux.

[pao: formatting]

[quinnj]

Dup of #260

[ivarne]

Because Julia currently have to compile the standard library on startup. That takes 2-4 seconds, but it is is constant so a more complex program would not have the same proportionate overhead. It is annoying while developing, but as I understand it the core developers has design considerations and runtime speedups higher on the task list for now.

[Keno]

There is also @StefanKarpinski 's excellent explanation here: http://stackoverflow.com/questions/10268028/julia-compiles-the-script-everytime/10483996