..  @code_warntype

Evaluates the arguments to the function call, determines their types, and calls :func:`code_warntype` on the resulting expression.


In Julia, the @code_warntype macro is used to evaluate the arguments of a function call, determine their types, and then call the code_warntype function on the resulting expression. This macro is helpful in identifying potential type instability issues in your code.

julia> function square(x)
           return x * x

julia> @code_warntype square(5)

1 ─ %1 = x::Int64
│   %2 = (%1 * %1)::Int64
└──      return %2

In the example above, the @code_warntype macro is used to inspect the square function when called with an argument of type Int64. The resulting output provides information about the variables and their inferred types within the function.

Common usage of @code_warntype includes:

  1. Checking type stability:

    julia> @code_warntype sum([1, 2, 3])
  2. Analyzing performance bottlenecks:

    julia> @code_warntype my_function(input_data)
  3. Identifying potential type inference issues:
    julia> @code_warntype my_function(argument)

Note: It's important to remember that @code_warntype is a tool for analyzing and debugging code performance and type stability. It does not directly modify or affect the behavior of the code.

Please let me know if you need further assistance!

See Also

User Contributed Notes

Add a Note

The format of note supported is markdown, use triple backtick to start and end a code block.

*Required Field

Checking you are not a robot: