Compiler optimizations

Inline expansion

In computing, inline expansion, or inlining, is a manual or compiler optimization that replaces a function call site with the body of the called function. Inline expansion is similar to macro expansion, but occurs during compilation, without changing the source code (the text), while macro expansion occurs prior to compilation, and results in different text that is then processed by the compiler. Inlining is an important optimization, but has complicated effects on performance. As a rule of thumb, some inlining will improve speed at very minor cost of space, but excess inlining will hurt speed, due to inlined code consuming too much of the instruction cache, and also cost significant space. A survey of the modest academic literature on inlining from the 1980s and 1990s is given in Peyton Jones & Marlow 1999. (Wikipedia).

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Related pages

Knapsack problem | Lambda calculus | Lazy evaluation | Enabling transformation | Parameter | Type checking | Order of operations | Partial evaluation | Loop unrolling | Abstract syntax tree | Escape analysis | Loop-invariant code motion | Call graph | Register allocation | Constant (mathematics) | Profile-guided optimization | Interprocedural optimization | Recursion (computer science)