Optimization replacing a function call with that function's source code
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.[1] 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.[2]
^Chen et al. 1993.
^Peyton Jones & Marlow 1999, 8. Related work, p. 17.
inlineexpansion, or inlining, is a manual or compiler optimization that replaces a function call site with the body of the called function. Inline expansion...
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