precompile
precompile(f,args::Tuple{Vararg{Any}})
Compile the given function f for the argument tuple (of types) args, but do not execute it.
Examples
-
Precompile a function with specific argument types:
julia> function add_numbers(x::Int, y::Int) return x + y end julia> precompile(add_numbers, (Int, Int))This example precompiles the function
add_numbersfor the argument typesIntandInt, without executing it. This can help improve performance by precompiling the function for specific argument types. -
Precompile a function with multiple argument types:
julia> function calculate_sum(x, y) return x + y end julia> precompile(calculate_sum, (Int, Float64))In this example, the function
calculate_sumis precompiled with the argument types(Int, Float64). -
Precompile a function with a tuple of argument types:
julia> function my_function(x::String, y::Int, z::Float64) return "$x - $y - $z" end julia> precompile(my_function, (String, Int, Float64))Here, the function
my_functionis precompiled with the argument types(String, Int, Float64).
Common mistake example:
julia> function my_function(x, y)
return x + y
end
julia> precompile(my_function, (Int, Int))
ERROR: MethodError: no method matching +(::Any, ::Any)
In this example, the function my_function has not been defined with specific argument types, resulting in a MethodError when trying to precompile it with (Int, Int) argument types. It's important to annotate the function arguments with their respective types to ensure correct precompilation.
See Also
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