Editing Inline expansion (section)

==Compiler support==
Compilers use a variety of mechanisms to decide which function calls should be inlined; these can include manual hints from programmers for specific functions, together with overall control via [[command-line option]]s. Inlining is done automatically by many compilers in many languages, based on judgment of whether inlining is beneficial, while in other cases it can be manually specified via compiler [[Directive (programming)|directives]], typically using a keyword or [[compiler directive]] called <code>inline</code>. Typically this only hints that inlining is desired, rather than requiring inlining, with the force of the hint varying by language and compiler.

Typically, compiler developers keep the above performance issues in mind, and incorporate [[heuristics]] into their compilers that choose which functions to inline so as to improve performance, rather than worsening it, in most cases.