benchmarking - Which method for handling conditions inside a function would be the most practical? -

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what's fastest, safest, , practical way of handling conditions inside function condition match must passed before function can proceed code @ all? below have function returns on condition failure, , function checks condition success:

function x() {     if ( !condition ) return;      [code] }

or

function y() {     if ( condition )     {         [code]     } }

mccabe's cyclomatic complexity punishes functions more 1 return statement. guess provide formalism supports structured programming (one entry point each function/"goto statement considered harmful") taken extreme, i.e. 1 exit point each function.

reducing number of return statements in function reduces number of break-points insert in debugging situation final values of function local variables inspected.

if development method involves frequent use of debugger argue using y() approach.


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